Vol. 11, Issue 2 (2022)

Author(s):
Asma Bisti, BN Harishbabu, B Manjunatha, S Sridhara and HB Mallikarjuna

Abstract:
An experiment was conducted to evaluate the genetic variability and diversity in segregating lines of green gram of the cross KKM-3 (High yielding) × IPM 205-7 (Early maturing, YMV resistance). High phenotypic coefficient of variation (PCV), genotypic coefficient of variation (GCV) were recorded for seed yield per plant, primary branches per plant and secondary branches per plant and moderate for number of pods per cluster, number of seeds per pod, plant height, number of clusters per plant, number of pods per plant, 100 seed weight and pod length, indicating that the selection for these traits will be effective. High broad-sense heritability (h²_bs) and genetic advance as per cent mean (GAM) was recorded for all the growth and yield traits confirming the additive gene action, except for number of clusters per plant. In contrast, high heritability (84.17) along with moderate GAM (12.76) was observed for days to 50% flowering signifying the role of non-fixable genetic variance. Based on the Mahalanobis’ D² statistics, F₃ progeny lines were classified into 9 clusters. The greater intra-cluster D² values were noticed in cluster VII. The greater inter-cluster distance was found between clusters VIII and IX, followed by between clusters I and VIII, suggesting that the genetic architecture of the progeny lines in one cluster differs entirely from those included in other clusters. The trait number of pods per plant contributed the most towards the overall genetic divergence, followed by plant height. Cluster I can be selected for superior segregants with high yielding and early maturing types.