Journal of Crop Breeding

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Asadi A A, Valiadeh M, Mohammadi S A, Khodarahmi M. (2019). Genetic Analysis of Some Physiological and Yield Traits in Wheat by F3 Families under Normal and late Season Water Deficit Conditions. jcb. 11(31), 55-64. doi:10.29252/jcb.11.31.55
URL: http://jcb.sanru.ac.ir/article-1-999-en.html

         Identification and selection of appropriate breeding methods and use of correct and applicable selection criteria for introducing resistant cultivars to water deficit stress is very important. In order to study the inheritance of physiological and agronomical traits in wheat, 50 F₃ lines along with parents and F₁ generations in a randomized complete block design with three replications under normal and water deficit conditions for two consecutive years were examined. The results showed that there are significant differences between and within the F₃ families for all traits in two environments. So, there is a lot of genetic variation for these traits. Gene effects in two different humidity conditions did not change significantly, and the genetic component of diversity in all traits in two environments was much larger than that of environmental diversity. In weight traits of 100-grain weight, plant height, spike length, number of grain per spike, number of spikelets per spike, grain diameter showed a moderate heritability in both environmental conditions, which indicate a greater role of additive variance in controlling of these traits, therefore, to improvethese traits, selection can be done in early generations. Grain yield per plant in both environmental conditions, showed high level of general heritability but low level of specific heritability, which indicates that, inheritance of this trait is geneticly controled, and it is not controlled by additive effects and, on the contrary, dominance effects play important role in controlling it.