Genetic Variability Studies in Dolichos Bean (Lablab purpureus L.) for Yield and Yield Traits

Aims: To study the genetic variability by phenotypic coefficient of variation, genotypic coefficient of variation, heritability and genetic advance as percent of mean in advanced breeding lines of Dolichos bean. Study Design: Augmented RCBD with six blocks. Place and Duration of Study: Department of Genetics and Plant Breeding, College of Agriculture, Shivamogga, during Late Kharif 2023. Methodology: The experimental material consisted of 64 advanced breeding lines of Dolichos bean including four checks viz., Hebbal avere-1, Hebbal avere-3, Hebbal avere-4 and Arka Jaya. Results: Analysis of variance revealed that significant variation was observed among the genotypes for all the characters studied. A high genotypic coefficient of variation (GCV) was observed for pods per plant (48.10%) followed by pod yield per plant, clusters per plant, pods per cluster, plant height and pod width, which indicates better scope for improvement of characters. A high phenotypic coefficient of variation (PCV) was observed for pod yield per plant (50%) followed by pods per plant, clusters per plant, pods per cluster, plant height and pod width. High heritability (>60%) was observed for all the traits studied. High heritability combined with high genetic advance as percent of mean was found for pods per plant (95.49%) followed by pod yield per plant, clusters per plant, pods per cluster, pod width and plant height which indicates that improvement of these charateristics through selection can be possible due to additive gene action. Conclusion: Yield can be increased by selecting the number of pods per plant, pod yield per plant, seed yield per plant number of cluster per pod, number of pods per plant and plant height.