Variability in growth characteristics for different genotypes of Eucalyptus tereticornis (SM.)

Abstract

Eighteen clones of Eucalyptus tereticornis (Sm.) were evaluated for three years by adopting randomized block design for various growth parameters at Hoshiarpur, Punjab, India and compared with two checks. Significant variations were recorded for height, diameter at breast height (DBH) and clear bole height (CBH). The broad sense heritability was low to moderate for both height and CBH. The genetic gain for height and CBH increased substantially per se with the increase in age of trees. The average genetic gain for three years was recorded maximum for height (159.60%) followed by DBH (110.97%) and CBH (70.34%). Clone 17 attained maximum DBH over other genotypes for second and third year followed by clones 14 and 11. Clone 5 showed an upward trend for DBH and maintained its superiority for CBH as the age of the tree increased. Similarly, clone 11 changed its ranking from 9th to 8th to 3rd for DBH and from 9th to 4th to 2nd for CBH, respectively for the age of one, two and three years. Nonetheless, clones 6 and 10 performed poorly for all the characters studied. Clones 17, 14 and 5 were found to be the most promising clones for commercial deployment.

Keywords

Eucalyptus tereticornis / clones / heritability / genetic advance / genetic gain

References

[1] Anon. 1991. Forestry statistics today for tomorrow. Wood and wood products 1961–1989: 2010. Food and Agriculture Organization of the United Nations, Rome.

[2] Anon. 2009. Water crisis and land degradation. Indian Environment Report, Ministry of Environment & Forest, Government of India, New Delhi.

[3] Apiolaza L.A., Raymond C.A., Yeo B.J.. Genetic varation of physical and chemical wood properties of Eucalyptus globules. Silvae Genetica, 2005, 54(4/5): 160-166.

[4] Aradhya K.M., Phillips V.D.. Gentetic variability in fourteen provenances of eucalyptus species in Hawaii. Silvae Genetica, 1993, 42(1): 9-15.

[5] Burton GW. 1952. Quantitative inheritance in grass. 6th International Grassland Congress, Part I: 277–283.

[6] Burton G.W., Devane E.H.. Estimating heritability in tall fecue (Festuca arundinaceae) from replicated clonal material. Agron J, 1953, 45: 478-481.

[7] Eldridge K., Davidson J.C., Hardwood, Wyk G.. Eucalyptus domestication and breeding. 1993, New York: Clarendon Press

[8] Foster G.S., Shaw D.V.. Using clonal replicates to explore genetic variation in a perennial plant species. Theor Appl Genet, 1988, 76: 788-794.

[9] Johnson H.K., Rabinson H.F., Comstock R.E.. Estimates of genetic and environmental variability in soybeans. Agron J, 1955, 47: 314-318.

[10] Kartawinata K., Riswan S., Gintings A.N., Puspitojati T.. An over view of post extraction secondary forests in Indonesia. Proc., Workshop on Tropical Secondary Forests in Asia: Reality and Perspectives, 10–14 April, 2000. 2000, Bogor, Indonesia: Centre of International Forestry Research

[11] Kumar A.. Growth performance and variability in different clones of Gmelina arborea (Roxb.). Silvae Genetica, 2007, 56(1): 32-36.

[12] Lal P.. National forest policy and raw materials: Supply by wood industries in India. Indian Forester, 2000, 126(4): 351-366.

[13] Lush I.L.. Heritability of quantitative characters in farm animals. Heriditas, 1949, 35(Supl.1): 356-387.

[14] Nelson C.D., Tauer C.G.. Genetic variation in juvenile characteristics of Populus deltoides from southern Great Plains. Silvae Genetica, 1987, 36: 216-221.

[15] Osorio L.F., White T.L., Huber D.A.. Age trends of heritability and genotype-by-environment interactions for growth traits and wood density for clonal Eucalyptus grandis Hill ex Maiden. Silvae Genetica, 2001, 50(3/4): 108-117.

[16] Raymond C.A.. Genetics of Eucalyptus wood properties. Annals of Forest Sciences, 2002, 59: 525-531.

[17] Sukhatme P.V., Amble V.N.. Statistical Methods for Agricultural Workers. 1989, New Delhi: Publication and Information Division, ICAR

[18] Zobel BJ. 1981. Vegetative propagation in forest management operations. In: Proc, 16th South For Tree Improv Meet, Blacksburg, Virginia. pp. 149–159.