Estimation of Components of Variation of Morphological Traits and Yield in A-genome Wheat Populations

Recombinant inbred lines (RIL) population (F7) of two A-genome progenitors i.e. T. monococcum and T. boeoticum were evaluated for various yield affecting parameters. For all the traits under study enlisting components of variance, genetic advance and heritability were observed to be showing highly significant differences (P ≤ 0.01). Trend of high phenotypic coefficients of variation (PCV) estimates for all the traits under study in all genotypes exhibited the impact of environment. Amongst the yield traits, a minor difference between GCV and PCV was detected for heading time (3.96, 4.36) booting time (3.55, 3.96), flowering time (2.31, 2.56). Huge difference between GCV and PCV was noticed for emergence percentage (16.83, 26.50), flag leaf length (19.26, 28.77) flag leaf sheath length (7.67, 15.08), flag leaf diameter (11.04, 22.51) and grain yield (10.43, 22.94) specifying the environmental impact. Reasonable heritability coupled with high genetic advance was observed for emergence percentage (0.40), booting time (0.81), heading time (0.82), flowering time (0.81), flag leaf length (0.45) and grain yield per plant (0.21) representing that these traits were under the control of additive genetic effects. We have demonstrated the genetic variation in diploid genome blood of wheat through this study which will considerably expand the potential of its genome being used for resistances to various disasters opening the possibility of achieving higher yields.