Estimation of Genetic Variability, Heritability and Genetic Advance for Yield and Yield Attributing Traits in Dolichos Bean (Lablab Purpureus L.)

Abstract

The present experiment was conducted to determine the genetic variability, heritability, genetic advance for yield and yield-related traits in dolichos bean at UAS, Bengaluru, during rabi 2020. The experimental material comprises six bush-type dolichos bean genotypes with two local checks were evaluated for 12 morpho-metric characters in randomized block design with three replications. The mean performance of all the characters analyzed was found significant. The genotype DOLBVAR-4 (52.80cm) recorded the maximum plant height and the minimum recorded for DOLBVAR-6 (49.30cm). The genotype DOLBVAR-2 (60.80g) recorded the highest pods plant-1, followed by HA 5 (60.60g) and DOLBVAR-4 (49.26g). The green pod yield hectare-1was maximum for genotype DOLBVAR-2 (3.90 t/ha) followed by HA 5 (3.60 t/ha) and DOLBVAR-3 (2.74 t/ha). In contrast, DOLBVAR-5 (2.00 t/ha) yielded the lowest among all the genotypes. High PCV and GCV were observed for the number of pods plant-1, pod length (cm), and pod width (cm), indicating the higher magnitude of variability for these traits and consequently more scope for their improvement through selection. High heritability coupled with high genetic advance as percent of mean was recorded for all the characters except for days to 50% flowering, primary branches plant-1 and plant height (cm). These results indicate these characters are under the influence of additive gene action; hence simple selection based on the phenotypic performance of these traits would be more effective.