Breeding for the resistance to Fusarium head blight of wheat in China

Hongxiang MA, Xu ZHANG, Jinbao YAO, Shunhe CHENG

Front. Agr. Sci. Eng. ›› 2019, Vol. 6 ›› Issue (3) : 251-264.

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Front. Agr. Sci. Eng. ›› 2019, Vol. 6 ›› Issue (3) : 251-264. DOI: 10.15302/J-FASE-2019262
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Breeding for the resistance to Fusarium head blight of wheat in China

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Abstract

With the changes of climate and cultivation systems, the Fusarium head blight (FHB) epidemic area in China has extended since 2000 from the reaches of the Yangtze River to the north and west winter wheat region. Breeding for FHB resistance in wheat is an effective way to control the disease. Chinese wheat breeders commenced research on FHB in the 1950s. Sumai 3, Ning 7840, Yangmai 158, Ningmai 9 and other cultivars with improved FHB resistance were developed through standard breeding methods and widely applied in production or breeding programs. In addition to intervarietal crosses, alien germplasm was used to improve FHB resistance of wheat. Addition, substitution and translocation lines with alien chromosomes or chromosome fragments were created to enhance FHB resistance. Somaclonal variation was also used to develop a FHB resistant cv. Shengxuan 3 and other cultivars with moderate resistance to FHB were released by such methods. QTL (quantitative trait loci) for FHB resistance were characterized in cultivars originating from China. The major QTL, Fhb1, was identified on chromosome 3BS in Sumai 3, Ning 894037, Wangshuibai and other Chinese resistant sources. Diagnostic molecular markers for Fhb1 have been applied in wheat breeding and breeding lines with improved FHB resistance and desirable agronomic traits have been obtained. However, breeding for FHB resistance is a long-term task, new technologies are likely to increase the efficiency of this process and better FHB resistance of new cultivars is expected to be achieved within the next decade.

Keywords

breeding / Fusarium head blight / wheat

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Hongxiang MA, Xu ZHANG, Jinbao YAO, Shunhe CHENG. Breeding for the resistance to Fusarium head blight of wheat in China. Front. Agr. Sci. Eng., 2019, 6(3): 251‒264 https://doi.org/10.15302/J-FASE-2019262

1 Introduction

Fusarium head blight (FHB) caused by Fusarium graminearum (teleomorph: Gibberella zeae) is a devastating disease of wheat in China as well as in other wheat-growing regions of the world where rainfall frequently occurs during flowering through to early grain-fill[1,2]. Previously, the FHB epidemics occurred mainly in the middle to lower reaches of the Yangtze River, including Zhejiang, Shanghai, south of Jiangsu, Anhui and Henan, north of Hubei in winter wheat, and north-eastern China in spring wheat. There were 7 years of severe epidemics and 10 years of moderately severe epidemics of FHB in 1951–1990[3]. Since 1990, the frequency of severe FHB epidemics has been lower in the reaches of Yangtze River due to the cultivation of wheat cultivars with moderate resistance to FHB. There were only two severe epidemics and seven moderately severe epidemics during 1991–2007[4]. However, since 1985, FHB has often occurred in other wheat production area, especially in the reaches of the Huai and Yellow Rivers. An outbreak of FHB occurred in 1985 with an area of about 3.3 Mha in Henan Province[5]. Also Gansu, Hebei, Ningxia, Qinghai, Shaanxi, Shandong and Sichuan regions have had epidemics of the disease since then[6,7].
Since 2000, the wheat FHB epidemic area has rapidly increased in China, and expanded from its previous epidemic area in the north and west winter wheat region. The epidemics of varying intensity have occurred, more frequently in the reaches of the Huai and Yellow Rivers, the largest region of wheat production in China. The largest epidemic area in Henan was 3.4 Mha in 2012[8]. On average, more than 5.4 Mha which accounts for about 23% of the total wheat production area of China are affected by the disease each year according to the data from the National Agro-Tech and Service Center of China (Fig. 1). There have been severe epidemics during five of the past 10 years, 2012, 2014, 2015, 2016 and 2018[9,10], which suggests that the frequency of severe epidemics of FHB is significantly higher than in the last century.
Fig.1 Epidemic area of Fusarium head blight of wheat in China since 2000

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FHB causes sterility, poor grain-fill and reduced test weight, thus resulting in significant yield loss. For example, the most severe FHB outbreak on record was in 2012 with an epidemic area of 9.95 Mha, causing direct yield losses of 2.08 Mt[10]. In addition to yield loss, the deteriorated quality of scabbed grain has become an even more critical issue of public concern because FHB infected grains contain mycotoxins such as trichothecenes and zearalenone (ZEN)[11,12], and significantly lower protein content. Trichothecenes are toxic to humans and animals, and cause dizziness, headaches, nausea, vomiting, abdominal pain, diarrhea, fever and sleepiness in humans, and cause food refusal and diarrhea in animals[13,14]. ZEN causes infertility and abortion in pregnant female animals, especially in pigs[15]. Recently, an analysis of mycotoxins in 158 wheat flour samples from markets in five regions including Anhui, Beijing, Henan, Jilin and Shandong revealed that the wheat flour was often contaminated by type B trichothecenes and ZEN. Deoxynivalenol (DON) was the most seriously contaminated type B trichothecenes with average concentration of 4.08 mg·kg1 and 68% of samples were over 1 mg·kg1, the upper limit for wheat flour contamination in China and other countries. ZEN was also detected with an average concentration of 86 mg·kg1, and 24% of investigated samples were over the limit value of 60 mg·kg1[16].
The frequency of severe epidemics of FHB has been increasing for the last decade in China and has been attributed in part to a combination of favorable weather conditions, increased area of corn-wheat and rice-wheat rotations, decreased fungicide effectiveness and lack of resistant cultivars.
FHB is a typical climatic disease in wheat. The germination of ascospores of F. graminearum is determined by temperature and humidity. Fungal cultures have shown that at 100% RH, 90% of ascospores germinated in 6–8 h when temperatures ranged from 25 to 30°C. The rate of ascospores germination also reached 90% in 12–24 h at 15°C. However, when RH was 90%, the germination rate of ascospores decreased significantly[17]. Thus, high humidity and warm weather will induce epidemics of FHB. A weather based model established using data in central China suggested climate change had direct impacts on the epidemics and severity of FHB[18]. El Nino indices coincided significantly with the epidemics of FHB in the reaches of the Yangtze River[19]. El Nino resulted in subtropical high pressure, cool summer, damp winter and warm wet conditions, which favor the development of epidemics of FHB. Sea surface temperature is a measure of El Nino and Southern Oscillation, known to strongly influence rainfall and air temperature, similar to the epidemics of FHB in the vicinity of Taihu Lake[20].
F. graminearum survives intercrop periods as mycelium, perithecium initials or chlamydospores in host crop residues. Corn, rice and wheat residues are especially suitable for survival and reproduction of F. graminearum[21,22]. To ensure food security in China, corn-wheat and rice-wheat rotations have over the last decades become major crop rotation systems in the reaches of the Yangtze and Yellow Rivers, respectively. In recent years, crop residue incorporation was fully applied in China. F. graminearum fungi propagate in large amounts on the soil surface and the undecayed residues provide an adequate source for outbreak of FHB[23]. Ding Kejian from Anhui Agricultural University determined that the rate of diseased spikes in incorporated corn residues was 2.78 times higher than in the control (personal communication). Thus, corn and rice-wheat rotations and residue incorporation caused the accumulation of Fusarium spp. and significantly increased the inoculum source for initial infection of FHB[24].
The application of fungicide is one of the effective ways to control FHB in wheat, with carbendazim being the main fungicide used in China since the 1970s[25]. Among 255 fungicides registered for FHB control, 226 include carbendazim as the main ingredient combined with other chemicals. However, more and more carbendazim-resistant isolates of Fusarium spp. have been found in the established FHB epidemic areas after 40 years of continuous application of such fungicide, which has resulted in lack of consistency in carbendazim efficacy[26,27]. The China Agriculture Research System monitored the carbendazim-resistant isolates in the reaches of the Yangtze and Yellow Rivers and found carbendazim-resistant isolates in all FHB epidemic areasbut they were most prevalent in the reaches of the Yangtze River. The average proportion of carbendazim-resistant isolates increased from 4.8% in 2008 to 40% in 2016 in Jiangsu Province, whereas the proportion of resistant isolates increased from 0.2% in 2009 to 13% in Anhui Province[10]. The rapid development of carbendazim-resistant isolates of Fusarium spp. has increased the difficulty of FHB prevention and control, which has consequently increased the amount of fungicide used and exacerbated the problem of environmental pollution[28].
There is large variation in the FHB resistance of wheat cultivars. Dozens of cultivars with moderate resistance to FHB and desirable agronomic traits have been released and adopted for wheat production in the reaches of Yangtze River during recent decades[3,29,30]. Nevertheless, most cultivars released in China are susceptible to FHB. Among the 302 cultivars released from the national cultivar trials from 2005 to 2016, only 12 cultivars bred in Jiangsu Province have moderate resistance to FHB (Table 1). Almost all moderately resistant cultivars are limited to the reaches of the Yangtze River with the exception of Huaimai 21, as their vernalization requirements are different from that in the reaches of Huai and Yellow Rivers.
Tab.1 Number of cultivars with moderate resistance to FHB released from national trials
Year Cultivars released Cultivars with MR or R to FHB
2005 22 Yangmai 17 (MR)
2006 32 Ningmai 13 (MR)
2007 30 Zhenmai 168 (MR)
2008 20 Ningmai 15 (MR), Huaimai 21 (MR)
2009 33 Ningmai 16 (MR), Shengxuan 6 (R)
2010 22 Nannong 0686 (MR)
2011 18
2012 16 Ningmai 18 (MR), Sumai 188 (MR)
2013 25 Ningmai 23 (MR)
2014 21
2015 34 Huamai 6 (MR)
2016 26
Total 302  

Note: MR, moderate resistance; R, resistance.

Among the factors increasing the frequency and severity of FHB epidemics, climate, crop rotation and residue incorporation system are difficult to change. Other agronomic practices, such as reducing plant density and nitrogen use, are not able to be used for controlling the disease. Fungicide application is the predominant method used to control FHB, however, this practice inevitably leads to higher investment and environmental contamination, and its effectiveness can be unpredictable due to the development of fungicide resistance and the timing of fungicide application in consistently raining weather[31]. There is also a growing body of evidence that suggests complex interactions between the environment, the pathogens and some fungicides can result in elevated mycotoxin levels[32,33]. Therefore, developing FHB resistant cultivars is the best choice for controlling the disease, and would reduce the need for fungicide application and promote sustainable development of agriculture.

2 Methods for evaluation of FHB resistance in wheat

The establishment of a resistance screening method is fundamental to the breeding of wheat with resistance to FHB. However, there are still conceptual gaps between resistance types and current methodology for FHB resistance screening. Schroeder and Christensen[34] proposed early in 1963 to divide FHB resistance into two types: type I resistance that prevents initial infection and type II resistance that prevents spread of symptoms within the spike. Miller et al.[35], Snijders and Perkowski[36] suggested a type of resistance that provides the ability to degrade trichothecene mycotoxins in kernels. Mesterhazy[37] included two additional types of resistance: resistance to kernel infection and tolerance (i.e., reduced yield loss).
The concept of types I and II resistance has been generally accepted and widely used by breeders[38]. To distinguish the two types of resistance, different inoculation methods are used in wheat. It is clear that type II resistance can be convincingly identified by point inoculation (i.e., the inoculation via injection of spore suspension into the single floret) and using severity or percentage of diseased spikelets as its rating criterion[39,40]. In a susceptible genotype, all of the spikelets will become blighted in as few as 10 days. But the situation with type I resistance appears not so clear, although there are some arguments that inoculation made by spawn inoculation (i.e., scattering infected kernels in the field) or spray inoculation (i.e., spraying spore suspension onto the wheat spikes) and recording disease incidence (i.e., percentage of scabbed spikes or spikelets) as rating criterion can be used as a suitable method for identification of this resistance type[41]. However, there are still a few unresolved questions in this approach for identification of typeIresistance. Timing of inoculation may be critical for evaluation of type I resistance and inoculation should be performed at anthesis. If a plant is inoculated earlier or later than that, the proportion of scabbed spikes or spikelets could significantly decrease, which might result in false positives. Disease pressure is also responsible for the evaluation of type I resistance. Bai and Shaner[38] compared the resistance in five genotypes ranging from highly resistant to highly susceptible using different concentration of conidia as inoculum. When 10000 spores were sprayed over a spike, all inoculated spikes were infected, and there was no significant difference in incidence. Zhang et al.[42] compared the severity in genotypes with different FHB resistance using point and spray inoculations, and found that the correlation coefficients of the proportion of scabbed spikelets 21 d after inoculation between two inoculation methods were 0.85–0.93. It may be difficult to separate types I and II resistance when data are recorded at late grain-fill stage.
For other resistance types, resistance to kernel infection can be measured as the percentage of infected kernels, and tolerance can be assessed by relative yield reduction when diseased and healthy plants of the same genotype are compared. These two resistance types have not been widely accepted because of some conceptual or operational weaknesses[41]. Resistance to trichothecene mycotoxins can be assessed as low DON content in kernels. Given that DON in the grain is toxic to humans and other animals, this adds additional economic losses to wheat and processing products. F. graminearum infected grain will usually contain DON regardless of the level of FHB resistance of the genotype. However, DON concentrations differ among genotypes[43]. Generally, DON accumulation is closely related to other resistant mechanisms. Low DON concentration in a bulk sample of grain may result from fewer infected kernels. Fewer infected kernels and lower yield reduction may be due to a high level of type I or II resistance, or due to loss of the severely affected kernels[44]. In general, DON concentration has a significant positive correlation with FHB severity, using both point and spray inoculations[41]. However, sometimes the resistance to DON accumulation appears inconsistent with type I or II resistance. If infection occurs during flowering, the infected ovary may not develop into a mature kernel, or the kernel may be so small and light that it is blown away during harvesting and threshing[41]. These lost kernels may have the highest levels of DON, and thus the DON content in the harvested grain may be lower than expected based on severity of head blight symptoms. For some moderately resistant genotypes, although infection occurs early, infected kernels may grow to normal size because of the faster grain-fill in these genotypes or the slower rate of fungal invasion of the spike. These genotypes can have an unacceptably high level of DON in harvested grain, whereas, if infection occurs later in the grain-filling stage, and weather favors fungal growth after infection, DON may also accumulate to a high concentration in harvested grain. In both cases, the harvested grain has a high DON concentration because these infected kernels are not light enough to be blown out of the combine with the chaff during harvest[45].
To breeders, the yield achieved under disease pressure is always of great concern irrespective of the kind of resistance involved. Therefore, the inoculation techniques and disease measurement parameters should be standardized for assaying FHB resistance in wheat cultivars. Based on the measurement of FHB resistance over many years, the Ministry of Agriculture in China established and issued two national industry standards: Rules for Resistance Evaluation of Wheat to Fusarium Head Blight (NY/T 1443.4-2007), and Technical Regulations for Resistance Evaluation of Wheat for Trials to Fusarium Head Blight Caused by F. graminearum (NY/T 2954-2016).
Two inoculation techniques and related measurement parameters are suggested in both regulations. For point inoculation, severity is divided into five levels ranging from zero to four according to the symptom of spikelets (Table 2). The average severity of inoculated spikes are counted to determine FHB resistance (Table 3). For spawn inoculation, the severity is also attributed to five levels from one to four, but the proportion of scabbed spikelets to determine severity level is different from that for point inoculation. The value given to FHB resistance of genotypes is called the disease index and is used for comparisons with resistant or susceptible controls. Sumai 3, Yangmai 158, Huaimai 20 and Annong 8455 are usually used as resistant, moderately resistant, moderately susceptible and susceptible controls, respectively. For consumers, the mycotoxins of grain needs more attention. However, the content of mycotoxin in grains is usually less than the safe limit in the genotypes with moderate resistance to FHB. Experience has shown that the national technical regulations are effective for evaluating FHB in wheat breeding programs.
Tab.2 Severity rating and its symptom with two inoculation methods
Severity Symptom categories for point inoculation Symptom categories for spawn inoculation
0 No symptoms No symptoms
1 Symptom limited on inoculated spikelets Proportion of scabbed spikelets less than 0.25
2 Proportion of scabbed spikelets less than 0.25 Proportion of scabbed spikelets from 0.25 to 0.5
3 Proportion of scabbed spikelets from 0.25 to 0.5 Proportion of scabbed spikelets from 0.5 to 0.75
4 Proportion of scabbed spikelets more than 0.5 Proportion of scabbed spikelets more than 0.75
Tab.3 Criteria for evaluating the resistance to FHB in two inoculation methods
Resistance level Average severity Disease index (DI)
Immune 0 0
Resistant 0–2.0 Greater than 0 up to the DI of the resistant control
Moderately resistant 2.0–3.0 Greater than the DI of the resistant control up to the DI of the moderately resistant control
Moderately susceptible 3.0–3.5 Greater than the DI moderately resistant control up to the DI of the susceptible control
Susceptible 3.5 Greater than the DI of the susceptible control

3 Standard breeding methods

A nationwide collaborative network for studies on the resistance to wheat FHB was established in China in the mid 1970s. As a result, cultivars with improved FHB resistance were developed by different breeding programs especially using standard breeding strategies.

3.1 Systematic selection

Back in the 1950s, long before the nationwide network was established, Chinese wheat breeders had already began to select plants or spikes with resistance to FHB from the fields where FHB occurred frequently[3]. Some moderately resistant cultivars were developed from susceptible cultivars by using systematic selection. For instance, the moderately resistant Wannian 2 and Wangmai 15 were selected from Nanda 2419 in 1958, Yangmai 1 and Wumai 1 were selected from Funo in 1968[46]. The area sown to these cultivars was more than 400000 ha in the 1960s[47]. Furthermore, Yangmai 3, with better FHB resistance than Yangmai 1, was developed by systematic selection in 1983[48]. While systematic selection has a long history in wheat breeding, some breeders continued to use this approach to select lines with improved resistance to FHB in the 2000s. Ningmai 13, Ningmai 14 and Ningmai 24 with moderate resistance to FHB was selected from Ningmai 9[49,50].

3.2 Intervarietal crosses

The intervarietal cross is a main method of genetic improvement for resistance to FHB in wheat. Among the resistant cultivars developed by this method, Sumai 3 is the best resistant source and has been widely used in genetic research and breeding in China and abroad[51,52]. Sumai 3 was bred from a cross between Funo, an Italian cultivar susceptible to FHB, and Taiwan wheat, a moderately susceptible land race from China[53]. The segregation lines were planted in the field scattered with scabbed kernels for FHB severity measurement and the lines with lowest severity of FHB were selected in every generation. After the release of Sumai 3 in 1974, it was extensively used as a resistant parent to improve FHB resistance of commercial cultivars. In the 1980s, many resistant lines derived from Sumai 3 were developed through intervarietal crosses. Such lines usually had stable type II resistance, similar to that of Sumai 3. Bai et al.[54] evaluated FHB resistance of 803 wheat cultivars and breeding lines from the southern part of China and found 27 had resistance to FHB. From these 27 resistant genotypes, 20 accessions were derived from Sumai 3 or its derivatives. Sumai 3 has high general combining ability for FHB resistance and can be effectively used to enhance FHB resistance of its progeny. Ning 7840, Yang 89-110 and Yang 92-617 were derived from Sumai 3. Ning 7840 (a cross of Avrora/Anhui 11/Sumai 3) not only has similar FHB resistance to Sumai 3, but also carries additional genes for resistance to other diseases, such as rusts and powdery mildew, and has better agronomic characteristics than Sumai 3[55]. More than 120 cultivars with FHB resistance developed in China are derived from Sumai 3[3]. However, most of them were not widely used for commercial wheat production because of other undesirable agronomic traits, such as excessive plant height, low spikelet density and low 1000-kernel weight[56].
Facing the difficulty of breaking the linkage between useful FHB resistance and undesirable agronomic traits during progeny selection, Cheng et al.[57] suggested that it is better to select progeny with improved FHB resistance from crosses between commercial cultivars with desirable agronomic traits and moderate susceptibility to FHB rather than using Sumai 3 as the parent. Yangmai 158, which has moderate resistance to FHB and desirable agronomic traits, was developed by using this strategy. Although parents including ND2419, Triumph, Funo and St1473/506 were susceptible or moderately susceptible to FHB, Yangmai 158 was obtained from transgressive segregation and has stable moderate resistance to FHB (Fig. 2). The greatest area sown to Yangmai 158 was about 200 ha in 1990s.
Fig.2 The pedigree of Yangmai 158

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Ningmai 9 is another cultivar selected from transgressive segregation using the same approach. The parents of Ningmai 9 are ND2419, Jiangdongmen, E-rou, Zao 5 and Norin 129[58]. Ningmai 9 is also a major commercial cultivar and was widely used for wheat production and breeding in the reaches of the Yangtze River in 2000s (Fig. 3).
Fig.3 The pedigree of Ningmai 9

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3.3 Recurrent selection

It is difficult to improve multiple traits including agronomic characters and disease resistance simultaniously by crossing two genotypes. Wu et al.[59] proposed a modified recurrent selection method to develop new cultivars with multiple improved characters including FHB resistance and desirable agronomic traits. Using a dominant male-sterile gene, Ta1 (Ms2) on chromosome 4DS from Taigu male sterile wheat, gene pools were developed by crossing multiple parents followed by recurrent selection. In each cycle, new sources are incorporated into the improved population to permit continued improvement, and superior breeding lines will be selected from the population to develop new cultivars by selfing. Researchers[60,61] created a dwarf male-sterile wheat, in which the dwarf gene Rht-D1c and Ms2 were closely linked on chromosome 4DS. It is easy to identify male-sterile and male-fertile progeny when using recurrent selection. Significant achievements using this approach have been made in wheat breeding in China. Nine lines with FHB resistance were developed, with the resistance of T154 being higher than that of Sumai 3[62]. Seven resistant lines, including Futai 8711, 8829 were also developed by Fujian Academy of Agricultural Sciences[63]. Emai 11 is a cultivar with moderate resistance to FHB and some improved agronomic traits developed by recurrent selection[64]. Huaihe 12013, released in 2017, is a cultivar with moderate resistance to FHB developed using this approach with an improved population from the parents of 276 cultivars.

4 Utilization of alien genes

Over 300 species in the tribe Triticeae carry homeologous wheat genomes A, B and D, and have different disease resistance which can be used in genetic improvement of wheat. A large number of wild species related to wheat have been evaluated for FHB resistance in China since the 1980s[65]. Wan et al.[66,67] evaluated 1507 accessions from 93 species in 18 genera and found that 31 accessions had resistance to initial infection and 151 accessions had resistance to spread. These resistant accessions were mostly from Agropyron, Elymus, Hystrix and Kengyilia. Most of the resistant accessions came from warm and subtropical areas with humid climates that would favor the growth and development of the FHB pathogen. However, such accessions inevitably had undesirable agronomic traits.
To avoid introduction of whole genome from wild species, individual chromosomes or chromosome fragments can be introduced into wheat. FHB resistance from wild species has been transferred to wheat by producing wheat-alien chromosome addition, substitution and translocation lines. Scientists from Nanjing Agricultural University have developed a number of wheat-alien chromosome lines and successfully transferred FHB resistant from wild species into wheat[68]. Evaluation of FHB resistance in the addition and substitution lines showed that chromosomes 7Lr and 5Lr from Leymus racemosus, chromosome 1Sc, 1Yc, 2Yc, 3Sc, 4Sc, 5Yc and 6Sc from Elymus ciliare, and chromosome 1Ets from Elymus tsukushiensis might carry FHB resistant genes[69,70]. FHB resistant gene from a translocation line of T4BS.4BL-7Lr#1S was introduced into two commercial cultivars, Nannong 0686 and Yangmai 15, by backcross. Six lines in Nannong 0686 background and three lines in Yangmai 15 background significantly reduced the proportion of scabbed spikelets compared to the relative recurrent parent. Qi et al.[71] developed three PCR markers to identify the QTL associated with FHB resistance on chromosome 7Lr#1S and named the QTL as Fhb3.
Five translocation lines of chromosome 1Y and three translocation lines of chromosome 6S from Roegneria cilliars were developed and had high resistance to FHB. For Elymus tsukushiensis, Wang et al.[70] produced wheat-E. tsukushiensis chromosome lines and found that the disomic addition having the group 1E. tsukushiensis chromosome 1Ets#1S added to the wheat genome conferred resistance to FHB. Cainong et al.[72] replaced corresponding homeologous region of chromosome 1AS of wheat with the FHB resistance-associated chromatin derived from 1Ets#1S of E. tsukushiensis. Plant progenies homozygous for such chromosome fragment had a disease severity rating of 7% compared to 35% for the null progenies. The FHB resistant QTL originated from chromosome 1E in E. tsukushiensis was designated Fhb6.
Another relative of wheat that has been intensively surveyed for FHB resistance is Elymus elongates[73]. A set of wheat-E. elongatus substitution lines in Chinese Spring genetic background have been developed. Among them, the substitution lines 7E(7A), 7E(7B) and 7E(7D) has the most resistance to FHB[74]. The QTL associated with FHB resistance was located on the long arm of chromosome 7el2 and designated Fhblop. Guo et al.[75] redesignated this QTL as Fhb7 and developed a recombinant inbred population for molecular mapping. Fhb7 was mapped to the chromosome between markers XsdauK66 and Xcfa2240 with the genetic distance of 1.7 cM. Recently, Kong Lingrang from Shangdong Agricultural University created two translocation lines, SDAU2002 and SDAU2004, which had the most resistance to FHB. Four lines with moderate resistance to FHB and desirable agronomic traits were bred by introducing an FHB resistance gene from E. elongatus into the commercial cv. Jimai 22 (personal communication).
In addition, wheat cvs Jingzhou 1 and Jingzhou 47 with moderate FHB resistance, were selected from the hybrid progenies of Nanda 2419 and indigenous rye accessions (Institute of Jingzhou Agricultural Sciences, Hubei Province, China). The moderately resistant Jingzhou 66 was selected from synthetic wheat material of Funo/durum and Nanda 2419/rye. The FHB resistant lines of Zhonghua series created by Jiangsu Academy of Agricultural Sciences originated from Psathyrostachys huashanica[29].

5 Somaclonal variation

Genetic variation in plants can be induced through tissue dedifferentiation and redifferentiation in vitro culture. Different tissues including immature embryo, immature spike, embryo, stem or node have been cultured in vitro to induce somaclonal variation. Among the cultured tissues, immature embryos were the best for inducing callus and forming plantlets[76]. Differences between many characters, such as stem height, spike shape, color and shape of grain were identified between wild type and variants[77]. The variations were validated by cytogenetics and DNA analysis[78]. Yu[79] demonstrated that in vitro culture could induce FHB resistant variants, and their resistance to FHB could be stably inherited. Such variants had high general combining ability for FHB resistance when they were used as parents. Among their progeny, 20%–30% lines had FHB resistance. Ningmai 3, a cultivar with high-yield potential but susceptible to FHB, was selected as material for inducing somaclonal variation. After in vitro culture of immature embryos, regenerated plants were evaluated for agronomic traits in the field and FHB resistance by artificial inoculation. Shengkang No. 1, a cultivar with moderate resistance to FHB, was obtained from the somaclonal variation of Ningmai 3 and released in Jiangsu in 1996 and Shanghai in 1999[76]. The area sown to this cultivar was up to 280000 ha in Anhui, Hubei, Jiangsu and Shanghai. Using the same approach, Shengxuan 3 was developed from Yangmai 158 somaclonal variants and released in 2003[80]. Shengxuan 3 has similar agronomic traits and the high-yield potential of Yangmai 158, but higher resistance to FHB (Table 4).
Tab.4 Comparison of characters in Shengxuan 3 and Yangmai 158
Cultivar Plant height/cm Spike length/cm Number of spikelets Number of kernels per spike Thousand kernel weight/g Yield/(t·ha-1) Test weight/(g·L-1) Protein content/% Gluten content/% Proportion of scabbed spikelets/%
Shengxuan 3 78.9 9.3 19.1 45.1 38.9 6.25 767 13.4 30.1 14.5–16.0
Yangmai 158 78.6 8.8 18.6 43.8 38.8 6.24 772 13.1 29.0 30.1–34.0
The rates of in vitro callus induction and plantlet formation for embryos were positively related to the resistance to FHB in cultivars when DON was added to the medium. Therefore, DON was added to medium for in vitro cultures to increase the efficiency of selection of somatic mutants. Immature embryo and young inflorescences of susceptible cultivar Alondra were used as explants to induce callus. The callus were cultured on MS differential medium with the addition of DON at 0.6 × 10-4–0.8 × 10-4 mol·L-1. About 20% callus cultures that tolerated DON were regenerated. FHB resistance evaluation in the field demonstrated that 40% to 50% of regenerated plants had better resistance than that of Alondra[29,78].

6 Molecular marker-assisted selection

Evaluation for the FHB resistance phenotype is time and resource-intensive, and results are often confounded by environmental factors, and therefore needs to be repeated in different environments. Molecular markers may provide an effective way for identifying FHB resistant genes/QTL in breeding populations. Marker-assisted selection (MAS) will reduce the need for phenotypic assays and increase the selection efficiency in wheat breeding for FHB resistance. Over the past 20 years, considerable research on molecular mapping of FHB resistance in wheat has been published. QTLs have been mapped on all 21 wheat chromosomes[81,82]. Chinese cultivars including Baisanyuehuang, CJ 9306, Haiyanzhong, Huangchandou, Huangfangzhu, Huapei 57-2, Ning 7840, Ning 894037, Sumai 3, Wangshuibai, and Wuhan 1 have been used as resistant or moderate resistant resources to identify QTLs associated with FHB resistance[8397]. At least 13 chromosomes possessing QTL associated with FHB resistance were found in these cultivars (Table 5). Among the detected FHB resistant QTL, QTL on chromosomes 3BS, 6BS and 5AS were the most reproducible QTL in wheat cultivars especially in those cultivars originating from China and were designated as Fhb1, Fhb2 and Fhb5, respectively. Another designated QTL, Fhb4, was identified on chromosome 4B in Wangshuibai[95], whereas three other designated QTL, Fhb3, Fhb6, and Fhb7, were identified in species related to wheat, Leymus racemosus, Elymus tsukushiensis and E. elongatus, respectively[71,72,75].
Tab.5 Chromosomes possessing QTL associated with FHB resistance in Chinese cultivars
Cultivar 1A 1B 2A 2B 2D 3A 3B 4B 5A 6B 6D 7A 7D Reference
Baisanyuehuang + + + Zhang et al., 2012[83]
CJ 9306 + + + Jiang et al., 2007[84]
Haiyanzhong + + + Li et al., 2011[85]
Huangcandou + + + + + Cai et al., 2014[86]
Huangfangzhu + + + + + Li et al., 2012[87]
Huapei 57-2 + + Bourdoncle & Ohm, 2003[88]
Ning 7840 + + Bai et al., 1999[89]; Zhou et al., 2002[90]
Ning 894037 + + Shen & Ohm, 2003[91]
Sumai 3 + + + + + Waldron et al., 1999[92]; Anderson et al., 2001[93]
Wangshuibai + + + + + + + + + Zhang et al., 2004[94]; Ma et al., 2006[95];Yu et al., 2008[96]
Wuhan 1 + + Somers et al., 2003[97]
Fhb1 was the first QTL associated with the resistance to FHB spread within a spike published. It was found in Sumai 3 and its derivate Ning 7840 by Waldron et al.[92] and Bai et al.[89], respectively. This is a major QTL and explained up to 53% of phenotypic variation in their studies. Thereafter, Fhb1 was identified as a major QTL and explained 30%–43% of phenotypic variation in different Chinese cultivars including Wangshuibai, Ning 894037 and Chinese Spring using different linkage mapping populations, although there is no definite relationship in the pedigree between these two FHB resistant cultivars[9598]. Three SSR markers, Xgwm 389, Xgwm 493 and Xgwm 533, were always linked to Fhb1 in mapping studies. Based on physical mapping of such SSR markers on 3BS deletion lines in Chinese Spring, the major QTL was located between the breakage point 3BS-3 and 3BS-8 with the fraction length of 0.78–0.87[90].
As Fhb1 is a major QTL for FHB resistance, the linkage SSR markers were used for introducing the QTL from resistant cultivars to improve FHB resistance of susceptible cultivars. The results of marker-assisted selection suggest that Fhb1 is a more effective QTL than other QTL for improving FHB resistance. Ning 7840 as an Fhb1 donor was backcrossed with a susceptible cv. Clark. A series of isogenic lines of BC5F4 were created using Xgwm 389, Xgwm 493 and Xgwm 533as selectable markers for Fhb1, and 71 combination primers as background selection markers. The evaluation of FHB resistance in isogenic lines and controls indicated that the proportion of scabbed spikelets was reduced by up to 40% and the marker Xgwm 533 is more efficient than Xgwm 493 and Xgwm 389 (Table 6).
Tab.6 Evaluation of FHB resistance in isogenic lines of Fhb1 in cv. Clark background
Line Xgwm 389 Xgwm 493 Xgwm 533 Proportion of scabbed spikelets/%
Ning 7840 + + + 19.0
Isogenic line 1 + + + 40.1
Isogenic line 2 + + 48.4
Isogenic line 3 + + 57.6
Isogenic line 4 + 67.3
Isogenic line 5 + 82.1
Isogenic line 6 88.1
Clark 88.7
Fhb1 could be utilized to improve the resistance in susceptible cultivars, however, the banding patterns of SSR marker allele in this chromosome region show variation in different resistant sources (Table 7), which makes it difficult for breeders to use such SSR markers in cases where they are not familiar with marker allele types of QTL donors and the recipient germplasm. To improve the efficiency of marker-assisted selection for FHB resistance, diagnostic markers linked to the Fhb1 should be developed. Sequence tagged site markers from wheat ESTs were developed and added to this region for saturating the Fhb1 QTL region[99]. However, most of them have no polymorphisms when they are used in other breeding populations and some of them only amplify PCR fragments in susceptible cultivars[100]. Based on a physical map spanning the Fhb1 region constructed using new DNA markers from BAC sequences, a high diagnostic marker, UMN10, was developed to separate resistant and susceptible cultivars. This marker consistently worked well with the Applied Biosystems 3130x1 Genetic Analyzer, and was used for large-scale marker-assisted selection for Fhb1 in breeding programs in the USA[101]. However, PCR products of UMN10 could not be clearly separated between resistant and susceptible cultivars on agarose gels[102] There is no facility similar to Genetic Analyzer in normal breeding programs in China. Therefore, two single nucleotide amplified polymorphism (SNAP) markers were developed by comparing the single nucleotide polymorphisms of PCR products between resistant and susceptible cultivars. These two markers are dominant and only amplified in resistant cultivars[103,104].
Tab.7 SSR marker alleles (bp) for the Fhb1 region in different cultivars
Cultivars BARC075 GWM389 GWM533 BARC147 GWM493 WMC754
Sumai 3 129 153 160 123 213 198, 154
Wangshuibai 129 151 158 125 215 194, 146
Ning 894037 129 153 160 123 213 198, 154
Fanshan wheat 139 153 131 123 215 202, 147
Wenzhouhongheshang 129 151 131 125 159 194, 148
The two SNAP markers have been used for Fhb1 selection in breeding programs in different wheat production areas. One was used to improve FHB resistance in susceptible commercial cv. Yangmai 15 by using marker-assisted selection. After the marker was used to screen each generation, lines with SNAP marker were selected for backcrossing for the next generation. The evaluation of FHB resistance showed that the proportion of scabbed spikelets ranged from 17% to 40% in the BC5F4 lines with Fhb1 marker and 49% in Yangmai 15 (Table 8). This indicated that all selected lines have more FHB resistance than that of Yangmai 15 but have considerable variation in FHB resistance. These results suggest that marker-assisted selection is a useful tool for improving FHB resistance, but phenotypic evaluation remains an important method for wheat breeding.
Tab.8 FHB resistance in BC5F4 lines with Fhb1 marker
Genotype Proportion of scabbed spikelets/%
Min Max Mean
BC5F4 lines with Fhb1 16.72 40.08 30.24±9.6
Yangmai 15 48.75±11.8
Sumai 3 6.20±0.9
With the development of molecular marker technology, KASP (kompetitive allele specific PCR) has been used as a high throughput system to detect SNP in wheat breeding. The best markers are functional markers that have been developed from SNP of functional genes. Rawat et al.[105] reported a pore-forming, toxin-like domain conferring FHB resistance for Fhb1. However, markers based on the SNP of this gene do not readily allow the distinction of FHB resistance or susceptible lines when hundreds of lines are assessed[106]. Based on sequencing of the Fhb1 region of near-isogenic lines, fragment deletions and SNP variations of His (histidine-rich calcium binding protein) gene have been identified, and most of the materials lacking 752 bp fragments were scab resistant materials. Su et al.[107] designated the His gene as TaHRC, and developed PCR molecular markers and KASP markers. These markers are more effective than UMN10 and other SSR markers developed earlier for the Fhb1. Zhu et al.[108] analyzed the distribution and putative donor of Fhb1 in Chinese wheat cultivars and found that Nimgmai 9 was the major donor for Fhb1 in Chinese cultivars. Actually, 23 cultivars derived from Ningmai 9 with moderate FHB resistance were released from national and provincial cultivar trials (Table 9).
Tab.9 Cultivars derived from Ningmai 9
Cultivar Release code Pedigree Breeder
Ningmai 13 National2006004 Ningmai9 system selection JAAS
Zhenmai 8 National2006008 Yangmai158/Ningmai9 LXH
Shengan 6 National2009004 Ningmai8/Ningmai9 DH JAAS
Ningmai 16 National2009003 Ningmai8/Ningmai9 JAAS
Nannong 0686 National2010003 MV964091/Ningmai9 NJAU
Ningmai 18 National2012003 Ningmai9*3/Yang 93-111 JAAS
Zhenmai 5 Jiangsu200406 Yangmai158/Ningmai9 Zhenjiang
Ningmai 14 Jiangsu200601 Ningmai9 system selection JAAS
Shengxuan 4 Jiangsu200606 Ningmai8/Ningmai9 DH JAAS
Yangfumai 4 Jiangsu200801 Ningmai8/Ningmai9 variant LXH
Yangmai 18 Jiangsu200901 4 × Ningmai9/3/6 × Yangmai158//88-128/NNP045 LXH
Yangmai 21 Jiangsu201102 Ningmai9/HJM LXH
Ningmai 20 Jiangsu201202 Y18//Ningmai8/Ningmai9 DH JAAS
Sumai 8 Jiangsu201302 Ningmai9/Yangmai11 Fengqing Seed Co. Ltd.
Ningmai 21 Jiangsu201303 Ningmai9/Yangmai158//Ningmai9 JAAS
Ningmai 26 Jiangsu2016004 Ning 9351/Ningmai9 JAAS
Sumai 9 Anhui201303 Ningmai9/Yangmai11 Fengqing Seed Co. Ltd.
Ningmai 24 Anhui201509 Ningmai9 system selection JAAS
Sumai 10 Anhui2016014 Ningmai9/Yangmai11 Fengqing Seed Co. Ltd.
Huimai 202 Anhui2016024 Ningmai9/Yangmai158 Tianqing Agri Co. Ltd.
Sunong 128 Anhui2016007 5E007/Ningmai9 Chuzhou College
Guangmingmai 1311 National20180005 3E158/Ningmai9 Guangming Seed Co. Ltd.
Nongmai 126 National20180008 Yangmai16/Ningmai9 Shengnong Seed Co. Ltd.

Note: JAAS, Jiangsu Academy of Agricultural Sciences; LXH, Lixiahe Regional Institute of Agricultural Sciences, Jiangsu; NJAU, Nanjing Agricultural University; Zhenjiang, Zhenjiang Regional Institute of Agricultural Sciences, Jiangsu.

Other QTL, such as Fhb2, Fhb4 and Fhb5 in landrace Wangshuibai, have been evaluated for improving FHB resistance in wheat cultivars in China[109]. However, such QTL have not been widely applied in marker-assisted selection in breeding for commercial cultivars, as the markers related to QTL for FHB resistance are not sufficiently diagnostic and effective[81].

7 Conclusions and prospects

Substantial progress in wheat breeding for FHB resistance has been made in China since the late of 1950s. Wheat cultivars with improved FHB resistance have been released mainly by standard breeding in China, especially in Jiangsu Province, based on the standardized evaluation technology of FHB resistance. Several important cultivars including Sumai 3, Ning 7840, Yangmai 158 and Ningmai 9 have been widely used in wheat production and breeding programs. Chromosome engineering has been used to introduce FHB resistant genes from species related to wheat. Also, somaclonal variation has likewise been used to improve FHB resistance in wheat. Significant achievements in molecular mapping and marker-assisted selection have been made over the past 20 years. Fhb1, the major QTL on chromosome 3BS, is a consistent QTL for FHB resistance in Sumai 3, Wangshuibai, and other Chinese cultivars, and has been effectively applied in marker-assisted selection for improving FHB resistance. The efficiency of marker selection for Fhb1 is increasing along with progress of molecular biology more widely. Ningmai 9 is now the major donor for Fhb1 in Chinese breeding programs.
In 2006, Chinese wheat breeders reached a consensus that increasing FHB resistance will be one of the most important targets for wheat breeding over the next two decades. By 2030, 20% of cultivars released in the middle to lower reaches of the the Yangtze River will possess FHB resistance similar to Sumai 3, and 10% of cultivars in the reaches of the Haui and Yellow Rivers will have moderate resistance to FHB similar to Yangmai 158. However, there is still a great gap between this target and the status quo. To achieve such aims, considerably more research and breeding activity need to be undertaken. Firstly, it will be necessary to establish national nurseries with stable environmental conditions, and a rapid, efficient and accurate standard technique to evaluate FHB resistance in breeding materials with desirable agronomic traits provided by different breeding regions and institutions. Moderately susceptible or moderately resistant accessions will need to be tested with yield potential and quality in cultivar trials. Secondly, resistant sources from Chinese landraces and breeding lines need to be further evaluated and assayed for novel genes or QTL. Thirdly, a set of high throughput DNA extraction and KASP marker screening technologies should be established for introducing Fhb1 from Ningmai 9 and other Fhb1 related cultivars into major commercial cultivars suited to the reaches of the Haui and Yellow Rivers to increase FHB resistance by using marker-assisted selection. Fourthly, effective diagnostic molecular markers for FHB resistant QTL, Fhb2, Fhb4 and Fhb5, should be developed based on new progress in wheat genomics and used in combination with Fhb1 to increase FHB resistance of cultivars. Finally, resistant genes or QTL, such as Fhb3, Fhb6, Fhb7, from species related to wheat need to be introduced to commercial cultivars backgrounds for improving FHB resistance thorough additive effects.

References

[1]
McMullen M, Bergstrom G, De Wolf E, Dill-Macky R, Hershman D, Shaner G, Van Sanford D. A unified effort to fight an enemy of wheat and barley: Fusarium head blight. Plant Disease, 2012, 96(12): 1712–1728
CrossRef Pubmed Google scholar
[2]
Giroux M E, Bourgeois G, Dion Y, Rioux S, Pageau D, Zoghlami S, Parent C, Vachon E, Vanasse A. Evaluation of forecasting models for Fusarium head blight of wheat under growing conditions of Quebec Canada. Plant Disease, 2016, 100(6): 1192–1201
CrossRef Pubmed Google scholar
[3]
Yao J B, Lu W Z. Progress on breeding for wheat scab resistance in China. Journal of Jiangsu Agricultural Sciences, 2000, 16(4): 242–248 (in Chinese)
[4]
Cheng S H, Zhang Y, Zhang B Q, Gao D R, Wu H Y, Lu C B, Lv G F, Fan J P. Analysis of main factors for control wheat scab epidemic. Jiangsu Journal of Agricultural Sciences, 2003, 19(1): 55–58 (in Chinese)
[5]
Li D W. Current status of research on wheat scab in Henan. Plant Protection, 1989, 15(1): 33–35 (in Chinese)
[6]
Li Y. The occurrence and cause analysis of wheat scab in Sichuan in 1996. Sichuan Agricultural Science and Technology, 1996, 26(6): 10 (in Chinese)
[7]
Guo X H, Li R X, Hu X Z, Tang T C. The causes for and control strategy of epidemics of wheat disease in Shijiazhuang in 1998. Plant Protection Technology and Extension, 1999, 19(1): 14–15 (in Chinese)
[8]
Jin Y, Liu F, Zhu T, Chen J, Zhao L. Occurrence analysis and control measures of wheat scab in Henan province. Journal of Henan Institute of Science and Technology, 2016, 44(6): 1–4 (in Chinese)
[9]
Liu W, Liu Z, Huang C, Lu M, Liu J, Yang Q. Statistics and analysis of crop yield losses caused by main disease and insect pests in recent 10 years. Plant protection, 2016, 42(5): 1–9 (in Chinese)
[10]
Chen Y, Wang J, Yang R, Ma Z. Current situation and management strategies of Fusarium head blight in China. Plant Protechtion, 2017, 43(5): 11–17 (in Chinese)
[11]
Scudamore K. Fate of Fusarium mycotoxins in the cereal industry: recent UK studies. World Mycotoxin Journal, 2008, 1(3): 315–323
CrossRef Google scholar
[12]
De Wolf E D, Madden L V, Lipps P E. Risk assessment models for wheat Fusarium head blight epidemics based on within-season weather data. Phytopathology, 2003, 93(4): 428–435
CrossRef Pubmed Google scholar
[13]
Janssen E M, Liu C, Van der Fels-Klerx H J. Fusarium infection and trichothecenes in barley and its comparison with wheat. World Mycotoxin Journal, 2018, 11(1): 33–34
CrossRef Google scholar
[14]
Wegulo S N. Factors influencing deoxynivalenol accumulation in small grain cereals. Toxins, 2012, 4(11): 1157–1180
CrossRef Pubmed Google scholar
[15]
Edwards S. Zearalenone risk in European wheat. World Mycotoxin Journal, 2011, 4(4): 433–438
CrossRef Google scholar
[16]
Han X, Li F, Xu W, Zhang H, Zhang J, Zhao X, Xu J, Han C. Natural occurrence of important mycotoxins produced by Fusarium in wheat flour from five provinces in China. China Swine Industry, 2017, 12(6): 33–39 (in Chinese)
[17]
Xu Y G. Experiment of spore germination of wheat scab. Journal of Nanjing Agricultural College, 1982, 5(2): 127–128 (in Chinese)
[18]
Wu Y Q, Zhang X. The study of prediction model for wheat Fusarium ear blight based on meteorology factors. Journal of Biomathematics, 2017, 32(1): 116–122 (in Chinese)
[19]
Zhao S, Yao C. A study on the relationship between the El Nino and the great prevalence of the wheat scab. Journal of Academy of Meteorological Science, 1989, 4(2): 214–218 (in Chinese)
[20]
Ju W M, Gao P, Wu J G. Relationship of ENSO to winter wheat gibberellin in the area of Taihu Lake and its prediction. Bulletin of Science and Technology, 2001, 17(3): 22–26 (in Chinese)
[21]
Dill-Macky R, Jones R K. Effects of previous crop and tillage on Fusarium head blight of wheat. Phytopathology, 1999, 89: S21
[22]
Landschoot S, Audenaert K, Waegeman W, De Baets B, Haesaert G. Influence of maize-wheat rotation system on Fusarium head blight infection and deoxynivalenol content in wheat under low versus high disease pressure. Crop Protection, 2013, 52: 14–21
CrossRef Google scholar
[23]
Mu C A, Li Z. Effects of returning crop stalks to the field on the crop diseases and pests in Huang-Huai area and its control measures. Anhui Agricultural Science, 2016, 44(11): 179–180 (in Chinese)
[24]
Qiao Y Q, Cao C F, Zhao Z, Du S Z, Zhang Y S, Liu Y H, Zhang S H. Effect of straw-returning and N-fertillizer application on yield, quality and occurrence of Fusarium head blight of wheat. Journal of Triticeae Crops, 2013, 33(4): 758–764 (in Chinese)
[25]
Research team of wheat scab in Fujian. Experiment of fungicide on the prevention of wheat scab. Fujian Agricultural Science and Technology, 1976, 7(1): 30–34 (in Chinese)
[26]
Zhou M G, Ye Z Y, Liu J F. Progress of fungicide resistance research. Journal of Nanjing Agricultural University, 1994, 17(3): 33–41 (in Chinese)
[27]
Dai D K, Jia X J, Wu D X, He Y P, Wang J X, Cheng C J, Zhou M G. Analysis of diffusion path of carbendazim-resistance population of Fusarium head blight based on Fusarium species, mycotoxin chemotype and resistance timing. Chinese Journal of Pesticide Science, 2013, 16(3): 279–285 (in Chinese)
[28]
Qian H, Chi M, Huang J. Research progress on fungicide resistance of Fusarium head blight. China Plant Protection, 2016, 36(4): 19–25 (in Chinese)
[29]
Ma H X, Lu W Z. Progress on genetic improvement for resistance to Fusarium head blight in wheat. Jiangsu Journal of Agricultural Sciences, 2010, 26(1): 197–203 (in Chinese)
[30]
Cheng S H, Zhang Y, Bie T D, Gao D R, Zhang B Q. Damage of wheat Fusarium head blight epidemics and genetic improvement of wheat for scab resistance in China. Jiangsu Journal of Agricultural Sciences, 2012, 28(5): 938–942 (in Chinese)
[31]
Diao C Y, Xu W F, Sheng Y C, Qian Z H, Pan Y L. Study on degradation rate and residual risk of main chemicals for Fusarium head blight. Modern Agrochemicals, 2017, 16(1): 41–42 (in Chinese)
[32]
Magan N, Hope R, Colleate A, Baxter E S. Relationship between growth and mycotoxin production by Fusarium species, biocides and environment. European Journal of Plant Pathology, 2002, 108(7): 685–690
CrossRef Google scholar
[33]
Audenaert K, Callewaert E, Höfte M, De Saeger S, Haesaert G. Hydrogen peroxide induced by the fungicide prothioconazole triggers deoxynivalenol (DON) production by Fusarium graminearum. BMC Microbiology, 2010, 10(1): 112
CrossRef Pubmed Google scholar
[34]
Schroeder H W, Christensen J J. Factors affecting resistance of wheat to scab caused by Gibberella zeae. Phytopathology, 1963, 53: 831–838
[35]
Miller J D, Young J C, Sampson D R. Deoxynivalenol and Fusarium head blight resistance in spring cereals. Journal of Phytopathology, 1985, 113(4): 359–367
CrossRef Google scholar
[36]
Snijders C H A, Perkowski J. Effect of head blight caused by Fusarium culmorum on toxin content and weight of wheat kernels. Phytopathology, 1990, 80: 566–570
CrossRef Google scholar
[37]
Mesterhazy A. Types and components of resistance to Fusarium head blight of wheat. Plant Breeding, 1995, 114(5): 377–386
CrossRef Google scholar
[38]
Bai G, Shaner G. Management and resistance in wheat and barley to Fusarium head blight. Annual Review of Phytopathology, 2004, 42(1): 135–161
CrossRef Pubmed Google scholar
[39]
Wang Y, Yang X, Hsiao C. The improvement of identification technique of scab resistance of wheat and the development of resistant sources. Scientia Agricultura Sinica, 1982, 24(5): 67–77 (in Chinese)
[40]
Cheng S, Yang S, Zhang B, Ji K, Zhao B, Gao D. Preliminary study on the identification method of wheat scab resistance to spread. Scientia Agricultura Sinica, 1994, 27(2): 45–49 (in Chinese)
[41]
Bai G, Shaner G. Scab of wheat: prospects for control. Plant Disease, 1994, 78 (8): 760–766
[42]
Zhang K M, Ma H X, Lu W Z, Cai Z X, Chen H G, Yuan S. Resistance to Fusarium head blight and deoxynivalenlo accumulation and allele variation of related SSR markers in wheat. Acta Agronomica Sinica, 2006, 32(12): 1788–1795 (in Chinese)
[43]
Bai G, Plattner R, Desjardins A, Kolb F L. Resistance to Fusarium head blight and deoxynivalenol accumulation in wheat. Plant Breeding, 2001, 120(1): 1–6
CrossRef Google scholar
[44]
Bechtel D, Kaleikau L, Gaines R, Seitz L. The effects of Fusarium graminearum infection on wheat kernels. Cereal Chemistry, 1985, 62: 191–197
[45]
Gunupuru L R, Perochon A, Doohan F M. Deoxynivalenol resistance as a component of FHB resistance. Tropical Plant Pathology, 2017, 42(3): 175–183
CrossRef Google scholar
[46]
Yu Y J. Genetic analysis for scab resistance in five wheat varieties. Scientia Agricultura Sinica, 1991, 17(4): 248–254 (in Chinese)
[47]
Cheng S, Yang S, Zhang B, Wei X. The effect of pure-line selection in wheat breeding program. Journal of Jiangsu Agricultural college, 1993, 14(3): 63–68 (in Chinese)
[48]
Chen D Y. Breeding and application of wheat cultivar Yangmai 3. Jiangsu Agricultural Sciences, 1982, 10(8): 11–14 (in Chinese)
[49]
Qian C M, Yang X M, Yao G C, Yao J B, Zhou C F, Wang L M. Breeding and application of superior quality and high yield wheat cultivar Ningmai 13. Jiangsu Agricultural Sciences, 2006, 34(5): 36–37 (in Chinese)
[50]
Yao J B, Ma H X, Yao G C, Chen D S, Yang X M, Zhang P, Zhang P P, Zhou M P, Jiang P. Breeding and application of superior quality and high yield wheat cultivar Ningmai 24. Jiangsu Agricultural Sciences, 2016, 44(6): 177–178 (in Chinese)
[51]
Liu Z Z, Wang Z Y. Improved scab resistance in China: sources of resistance and problems. In: Proceedings of International Conference on Wheat for the Nontraditional Warm Areas. Mendeley, 1991, 178–188
[52]
Liu Z Z, Wang Z Y, Huang D C, Zhao W J, Huang X M, Yao Q H, Sun X J, Yang Y M. Generality of scab-resistance transgression in wheat and utilization of scab-resistance genetic resources. Acta Agriculturae Shanghai, 1991, 7: 65–70 (in Chinese)
[53]
Bai G, Chen L F, Shaner G E. Breeding for resistance to head blight of wheat in China. In: Leonard K J, Bushnell W R. eds. Fusarium Head Blight of Wheat and Barley. St. Paul, US: APS Press, 2003, 296–317
[54]
Bai G, Zhou C F, Qian C M, Ge Y F. A study of scab-resistance in new wheat cultivars and advanced lines. Jiangsu Agricultural Sciences, 1989, 17(7): 20–22 (in Chinese)
[55]
Zhou C F, Xia S S, Qian C M, Yao G C, Shen J X. On the problem of wheat breeding for scab resistance. Scientia Agricultura Sinica, 1987, 20(2): 19–25 (in Chinese)
[56]
Jiang G L, Wu Z S. Genetics of the resistance to scab spread and its correlation to agronomic traits in a cross of Aiganzao × Sumai 3. Journal of Nanjing Agricultural University, 1989, 12(4): 122–123 (in Chinese)
[57]
Cheng S H, Zhang Y, Zhang B Q, Gao D R, Wu H Y, Lu C B, Lv G F, Wang C S. Discussion of two ways of breeding scab resistance in wheat. Journal of Yangzhou University (Agricultural and Life Science Edition), 2003, 24(1): 59–62 (in Chinese)
[58]
Qian C M, Zhou C F, Yao G C, Yao J B, Shen P Y, Yang X M. Breeding and application of novel wheat cultivar Ningmai 9. Jiangsu Agricultural Sciences, 1999, 27(3): 19–20 (in Chinese)
[59]
Wu Z S, Shen J Q, Lu W Z. Development of a gene pool with improved resistance to scab in wheat. Acta Agronomica Sinica, 1984, 10(2): 73–80 (in Chinese)
[60]
Liu B H, Yang L, Wang S H, Meng F H. The method and technique of population improvement using dwarf male-sterile wheat. Acta Agronomica Sinica, 2002, 28(1): 69–71 (in Chinese)
[61]
Zhai H Q, Liu B H. The innovation of dwarf male sterile wheat and its application in wheat breeding. Scientia Agricultura Sinica, 2009, 42(12): 4127–4131 (in Chinese)
[62]
Zhang L Q, Pan X P, Chen H Y. Studies on recurrent selection of wheat resistance to Gibberella zeae (Schw.) Petch (resistance to spread). Journal of South China Agricultural University, 1993, 14(2): 55–60 (in Chinese)
[63]
Zhang S N, Ye D S, Zhang Q Y. Improvement of resistance to head blight of wheat by recurrent selections with Tai nucleus sterile line. Journal of Fujian Academy of Agricultural Sciences, 1995, 10(2): 1–4 (in Chinese)
[64]
Zhuang Z Y, Liang S C, Li M F. Application of dominant nucleus sterile gene Ta1 in breeding E-Mai 11. Hubei Agricultural Sciences, 1995, 34(4): 18–20 (in Chinese)
[65]
Cai X, Chen P D, Xu S S, Oliver R E, Chen X. Utilization of alien genes to enhance Fusarium head blight resistance in wheat—a review. Euphytica, 2005, 142(3): 309–318
CrossRef Google scholar
[66]
Wan Y F, Yen C, Yang J L. The diversity of head-scab resistance in Triticeae and their relation to ecological conditions. Euphytica, 1997, 97(3): 277–281
CrossRef Google scholar
[67]
Wan Y F, Yen C, Yang J L, Quan L F. Evaluation of Roegneria for resistance to head scab caused by Fusarium graminearum Schwabe. Genetic Resources and Crop Evolution, 1997, 44(3): 211–215
CrossRef Google scholar
[68]
Liu D J. Genome analysis in wheat breeding for disease resistance. Acta Botanica Sinica, 2002, 44: 1096–1104 (in Chinese)
[69]
Chen P D, Wang Z T, Wang S L, Huang L, Wang Y Z, Liu D J. Transfer of useful germplasm for Leymus racemosus Lam. to common wheat. Development of addition lines with wheat scab resistance. Acta Genetica Sinica, 1995, 22: 380–386 (in Chinese)
[70]
Wang S L, Qi L L, Chen P D, Liu D J, Friebe B, Gill B S. Molecular cytogenetic identification of wheat-Elymus tsukushiense introgression lines. Euphytica, 1999, 107(3): 217–224
CrossRef Google scholar
[71]
Qi L L, Pumphrey M O, Friebe B, Chen P D, Gill B S. Molecular cytogenetic characterization of alien introgressions with gene Fhb3 for resistance to Fusarium head blight disease of wheat. Theoretical and Applied Genetics, 2008, 117(7): 1155–1166
CrossRef Pubmed Google scholar
[72]
Cainong J C, Bockus W W, Feng Y, Chen P, Qi L, Sehgal S K, Danilova T V, Koo D H, Friebe B, Gill B S. Chromosome engineering, mapping, and transferring of resistance to Fusarium head blight disease from Elymus tsukushiensis into wheat. Theoretical and Applied Genetics, 2015, 128(6): 1019–1027
CrossRef Pubmed Google scholar
[73]
Shen X, Ohm H. Fusarium head blight resistance derived from Lophopyrum elongatum chromosome 7E and its augmentation with Fhb1 in wheat. Plant Breeding, 2006, 125(5): 424–429
CrossRef Google scholar
[74]
Kim N S, Armstrong K, Knott D R. Molecular detection of Lophopyrum chromatin in wheat-Lophopyrum recombinants and their use in the physical mapping of chromosome 7D. Theoretical and Applied Genetics, 1993, 85(5): 561–567
CrossRef Pubmed Google scholar
[75]
Guo J, Zhang X, Hou Y, Cai J, Shen X, Zhou T, Xu H, Ohm H W, Wang H, Li A, Han F, Wang H, Kong L. High-density mapping of the major FHB resistance gene Fhb7 derived from Thinopyrum ponticum and its pyramiding with Fhb1 by marker-assisted selection. Theoretical and Applied Genetics, 2015, 128(11): 2301–2316
CrossRef Pubmed Google scholar
[76]
Lu W Z, Jiang N, Zhou N, Shen X R, Xu R L. Studies on somaclonal variation of scab resistant lines in wheat. Journal of Agricultural Biotechnology, 1995, 3(2): 7–11 (in Chinese)
[77]
Lu W Z, Cheng S H, Shen X R, Zhou C F, Zhang J J, Wang Y Z. Study on utilization of cell engineering in breeding wheat for scab resistance. Jiangsu Journal of Agricultural Sciences, 1998, 14(1): 9–14 (in Chinese)
[78]
Shen X R, Lu W Z, Xu R L, Jiang N, Zhou M P. Analysis between the somaclonal wheat line 895004 and its donor parent. Jiangsu Journal of Agricultural Sciences, 1996, 12(1): 7–10 (in Chinese)
[79]
Yu Y J. Analysis on genetic stability of resistance to scab in wheat somaclonal variants and combining ability test. Journal of Huazhong Agricultural University, 1997, 16(2): 118–122 (in Chinese)
[80]
Lu W Z, Cheng S H, Ma H X, Ma T B, Zhou M P, Zhang B Q, Li H B, Zhang Y. A new wheat variety with high quality, high yield and resistance to wheat scab—Shengxuan 3. Jiangsu Journal of Agricultural Sciences, 2003, 19(2): 69 (in Chinese)
[81]
Li T, Li A A, Li L. Fusarium head blight in wheat: from phenotyping to resistance improvement. Science and Technology Review, 2016, 34(22): 75–80 (in Chinese)
[82]
Bai G H, Su Z Q, Cai J. Wheat resiatance to Fusarium head blight. Canadian Journal of Plant Pathology, 2018, 40(3): 336–346
CrossRef Google scholar
[83]
Zhang X, Pan H, Bai G. Quantitative trait loci responsible for Fusarium head blight resistance in Chinese landrace Baishanyuehuang. Theoretical and Applied Genetics, 2012, 125(3): 495–502
CrossRef Pubmed Google scholar
[84]
Jiang G L, Shi J, Ward R W. QTL analysis of resistance to Fusarium head blight in the novel wheat germplasm CJ 9306. I. Resistance to fungal spread. Theoretical and Applied Genetics, 2007, 116(1): 3–13
CrossRef Pubmed Google scholar
[85]
Li T, Bai G, Wu S, Gu S. Quantitative trait loci for resistance to Fusarium head blight in a Chinese wheat landrace Haiyanzhong. Theoretical and Applied Genetics, 2011, 122(8): 1497–1502
CrossRef Pubmed Google scholar
[86]
Cai J, Bai G H. Quantitative trait loci for Fusarium head blight resistance in Huangcandou/Jagger wheat population. Crop Science, 2014, 54(6): 2520–2528
CrossRef Google scholar
[87]
Li T, Bai G H, Wu S Y, Gu S L. Quantitative trait loci for resistance to Fusarium head blight in the Chinese wheat landrace Huangfangzhu. Euphytica, 2012, 185(1): 93–102
CrossRef Google scholar
[88]
Bourdoncle W, Ohm H W. Quantitative trait loci for resistance to Fusarium head blight in recombinant inbred wheat lines from the cross Huapei 57-2/Patterson. Euphytica, 2003, 131(1): 131–136
CrossRef Google scholar
[89]
Bai G, Kolb F L, Shaner G, Domier L L. Amplified fragment length polymorphism markers linked to a major quantitative trait locus controlling scab resistance in wheat. Phytopathology, 1999, 89(4): 343–348
CrossRef Pubmed Google scholar
[90]
Zhou W, Kolb F L, Bai G, Shaner G, Domier L L. Genetic analysis of scab resistance QTL in wheat with microsatellite and AFLP markers. Genomics, 2002, 45(4): 719–727
CrossRef Pubmed Google scholar
[91]
Shen X, Zhou M, Lu W, Ohm H. Detection of Fusarium head blight resistance QTL in a wheat population using bulked segregant analysis. Theoretical and Applied Genetics, 2003, 106(6): 1041–1047
CrossRef Pubmed Google scholar
[92]
Waldron B L, Moreno-Sevilla B, Anderson J A, Stack R W, Frohberg R C. RFLP mapping of QTL for Fusarium head blight in wheat. Crop Science, 1999, 39(3): 805–811
CrossRef Google scholar
[93]
Anderson J A, Stack R W, Liu S, Waldron B L, Fjeld A D, Coyne C, Moreno-sevilla B, Mitchell F J, Song Q J, Cregan P B, Frohberg R C. DNA markers for Fusarium head blight resistance QTL in two wheat populations. Theoretical and Applied Genetics, 2001, 102(8): 1164–1168
CrossRef Google scholar
[94]
Zhang X, Zhou M P, Ren L J, Bai G H, Ma H X, Scholten Q E, Guo P G, Lu W Z. Molecular characterization of Fusarium head blihgt resistance from wheat variety Wangshuibai. Euphytica, 2004, 139(1): 59–64
CrossRef Google scholar
[95]
Ma H X, Zhang K M, Gao L, Bai G H, Chen H G, Cai Z X, Lu W Z. Quantitative trait loci for resistance to Fusarium head blight and deoxynivalenol accumulation in Wangshuibai wheat under field conditions. Plant Pathology, 2006, 55(6): 739–745
CrossRef Google scholar
[96]
Yu J B, Bai G H, Zhou W C, Dong Y H, Kolb F L. Quantitative trait loci for Fusarium head blight resistance in a recombinant inbred population of Wangshuibai/Wheaton. Phytopathology, 2008, 98(1): 87–94
CrossRef Pubmed Google scholar
[97]
Somers D J, Fedak G, Savard M. Molecular mapping of novel genes controlling Fusarium head blight resistance and deoxynivalenol accumulation in spring wheat. Genome, 2003, 46(4): 555–564
CrossRef Pubmed Google scholar
[98]
Ma H X, Bai G H, Zhang X, Lu W Z. Main effects, epistasis, and environmental interactions of quantitative trait Loci for Fusarium head blight resistance in a recombinant inbred population. Phytopathology, 2006, 96(5): 534–541
CrossRef Pubmed Google scholar
[99]
Liu S, Zhang X, Pumphrey M O, Stack R W, Gill B S, Anderson J A. Complex microcolinearity among wheat, rice, and barley revealed by fine mapping of the genomic region harboring a major QTL for resistance to Fusarium head blight in wheat. Functional & Integrative Genomics, 2006, 6(2): 83–89
CrossRef Pubmed Google scholar
[100]
Guo P G, Bai G H, Shaner G E. AFLP and STS tagging of a major QTL for Fusarium head blight resistance in wheat. Theoretical and Applied Genetics, 2003, 106(6): 1011–1017
CrossRef Pubmed Google scholar
[101]
Liu S, Micael O, Anderson J. Toward positional cloning of Fhb1, a major QTL for Fusarium head blight resistance in wheat. Cereal Research Communications, 2008, 36(Supplement 6): 195–201
CrossRef Google scholar
[102]
Du J K, Yu G H, Wang X E, Ma H X. Development and validation of a SSCP marker for Fusarium head blight resistance QTL region in wheat. Journal of Triticeae Crops, 2010, 30(5): 829–834 (in Chinese)
[103]
Ma H X, Wang L, Zhang X. A pair of primer and its application in screening for the resistance to scab in wheat. A Chinese Patent, 2014, ZL201310013279.2
[104]
Wang L, Ma H X, Zhang X, Yu G H, Du J K. A pair of primer and its application in screening for resistance to scab in wheat. A Chinese Patent, 2014, ZL201310013281.X
[105]
Rawat N, Pumphrey M O, Liu S, Zhang X, Tiwari V K, Ando K, Trick H N, Bockus W W, Akhunov E, Anderson J A, Gill B S. Wheat Fhb1 encodes a chimeric lectin with agglutinin domains and a pore-forming toxin-like domain conferring resistance to Fusarium head blight. Nature Genetics, 2016, 48(12): 1576–1580
CrossRef Pubmed Google scholar
[106]
He Y, Zhang X, Zhang Y, Ahmad D, Wu L, Jiang P, Ma H. Molecular characterization and expression of PFT, an FHB resistance gene at the Fhb1 QTL in wheat. Phytopathology, 2018, 108(6): 730–736
CrossRef Pubmed Google scholar
[107]
Su Z, Jin S, Zhang D, Bai G. Development and validation of diagnostic markers for Fhb1 region, a major QTL for Fusarium head blight resistance in wheat. Theoretical and Applied Genetics, 2018, 131(11): 2371–2380
CrossRef Pubmed Google scholar
[108]
Zhu Z W, Xu D A, Cheng S H, Gao C B, Xia X C, Hao Y F, He Z H. Characterization of Fusarium head blight resistance gene Fhb1 and its putative ancestor in Chinese wheat germplasm. Acta Agronomica Sinica, 2018, 44(4): 473–482 (in Chinese)
[109]
Jia H Y, Zhou J Y, Xue S L, Li G Q, Yan H S, Ran C F, Zhang Y D, Shi J X, Jia L, Wang X, Luo J, Ma Z Q. A journey to understand wheat Fusarium head blight resistance in the Chinese wheat landrace Wangshuibai. Crop Journal, 2018, 6(1): 48–59
CrossRef Google scholar

Acknowledgements

This work was funded by the National Key Project for the Research and Development of China (2017YFD0100806), and the China Agricultural Research System Program (CARS-03).

Compliance with ethics guidelines

Hongxiang Ma, Xu Zhang, Jingbao Yao, and Shunhe Cheng declare that they have no conflicts of interest or financial conflicts to disclose.
This article does not contain any studies with human or animal subjects performed by any of the authors.

RIGHTS & PERMISSIONS

The Author(s) 2019. Published by Higher Education Press. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0)
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