Heritability and genetic advance for polygenic traits in M_2 generation of soybean

摘要

Differences in mean values of traits treated and untreated populations were also noticed. Heritability (h_2) and genetic advance (GA) were studied in M_2 progenies for four varieties Monetta, MACS-346, 57 and 124 irradiated to five doses 10, 20, 30,40, and 50 kR doses. The estimates of heritability in broad sense were higher than control for traits viz., days to maturity (except 30 kR); pods/plant except (50 kR); grain yield/plant and 100 grain weight (at 10 and 20 kR only). Genetic advance as percentage of mean was higher than control for traits viz., plant height, pods/plant and grains/pod. While it was higher in only certain doses for traits branches/plant (40 and 50 kR) and 100 grain weight (10 and 20 kR).