Increasing agricultural losses caused by insect infestations are a significant problem, so it is important to generate pest-resistant crop varieties to address this issue. Several reviews have examined aphid-plant interactions from an entomological perspective. However, few have specifically focused on plant resistance mechanisms to aphids and their applications in breeding for aphid resistance. In this review, we first outline the types of resistance to aphids in plants, namely antixenosis, tolerance (cell wall lignification, resistance proteins), and antibiosis, and we discuss strategies based on each of these resistance mechanisms to generate plant varieties with improved resistance. We then outline research on the complex interactions amongst plants, viruses, and aphids, and discuss how aspects of these interactions can be exploited to improve aphid resistance. A deeper understanding of the epigenetic mechanisms related to induced resistance, i.e. the phenomenon where plants become more resistant to a stress they have encountered previously, may allow for its exploitation in breeding for aphid resistance. Wild relatives of crop plants serve as important sources of resistance traits. Genes related to these traits can be introduced into cultivated crop varieties by breeding or genetic modification, and de novo domestication of wild varieties can be used to exploit multiple excellent characteristics, including aphid resistance. Finally, we discuss the use of molecular design breeding, genomic data, and gene editing to generate new aphid-resistant, high-quality crop varieties.
Acknowledgements
This work was supported by the National Natural Science Foundation of China (grant Nos. 32341043, 32302534), The ‘JBGS’ Project of Seed Industry Revitalization in Jiangsu Province (grant No. JBGS [2021]018), and the Natural Science Foundation of Jiangsu Province (grant No. BK20230574).
Author contributions
X.Y. and X.C. proposed a general idea for the review. L.Z., C.C., X.L., Y.D., and Z.L. gathered the literature to write the manuscript. X.Y. and L.Z. wrote and revised the manuscript with contributions from F.L., Y.L., and H.S. W.Z. and C.S. drew the figures.
Data availability
Not applicable.
Conflict of interest statement
The authors declare that they have no conflicts of interest.
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