Genetic analysis of dolichos bean (Lablab purpureus L.) genotypes for horticultural traits

Abstract

The present investigation was carried out to study the genetic variability, heritability and genetic advance for 18 traits in dolichos bean. The experimental material comprised of 40 genotypes of dolichos bean (Lablab purpureus L.).The highest value of genotypic coefficient of variation (33.99) and Phenotypic coefficient of variation (34.36) were recorded for Pod Weight (10 Pods). The highest heritability estimate was observed for The highest heritability was recorded for the characters 100 Seed Weight (98.89), Days to first Flowering (98.77), Green Pod Yield Per Plot(98.32), Days to 100% Flowering (98.28), Days to 50% flowering (98.13), Green Pod Yield Per Plot (98.13),Days to 100% flowering(98.28), Green Pod Yield Per plant (98.32), Pod Weight (10 Pods) (97.89), Inflorescence Length (97.35), and Days to First Green Pod Harvest (97.35), Vine Length (95.16), Green Pod Yield Per Hectare (93.33), Pod Length (93.86), Days to Last Green Pod Harvest (91.38), Pod Width (90.69), Seed Per pod (79.57), Pod Per Inflorescence (77.05), Flower Per inflorescence (71.58),.The highest genetic advance as percent of mean observed for Pod Weight (10 Pods) (69.28) while recorded lowest for Days to last green pod harvest (9.46). Hence selection will be effective for these traits. The divergence analysis revealed that the presence of appreciable amount of genetic diversity in the tested genotypes. Cluster IV had highest number of genotypes (13) followed by cluster II (10), cluster V (9), cluster I (6), cluster III, cluster VI and cluster VII, having 1 genotype. The maximum inter cluster distance was observed between cluster no. I and VI (2898.05) and cluster no. VI and VII (1569.61) showed minimum inter cluster distance. The highest intra cluster distance was recorded for cluster no. IV (845.17) and cluster no. 2 (345.56) showed minimum intra cluster distance.