Assessment of variability in twenty-four lines of blackgram (Vigna mungo L.)

Variability, heritability and genetic advance were studied in twenty-four lines of blackgram for seven quantitative traits. The analysis of variance showed significant differences among genotypes for all the traits under study. Replication item was significant for all the traits except LA50%F and NS/P. Interaction (L×R) was significant for NSBFF, NL50%F, LA50%F, NS/P and RL50%F. The phenotypic variation ( 2 p) was greater than those of 2 L, 2 LR and 2 w components of variation for all the traits. The highest phenotypic and genotypic variations were observed for LA50%F followed by NN50%. It is also noticed that phenotypic coefficients of variability (PCV) in general, were higher than the estimates of genotypic coefficients of variability (GCV) for all the traits. The traits viz., LA50%F and NN50% showed high GCV estimates whereas; NN50%, NSBFF, LA50%F, and NL50%F exhibited high PCV. The heritability, genetic advance (GA) and genetic advance as percentage of mean (GAM %) were found to be low.