STUDIES ON VARIABILITY, HERITABILITY AND GENETIC ADVANCE FOR YIELD AND YIELD RELATED TRAITS IN GREENGRAM [VIGNA RADIATA (L.) WILCZEK

Abstract

This investigation was conducted to evaluate 19 parents (16 lines x 3 testers), 48 F1 and 48 F2 . Analysis of variance showed high significant differences among 115 greengram genotypes for 13 studied quantitative traits. In F1 , the highest phenotypic and genotypic coefficient of variation was observed for 100 seed weight followed by harvest index. Moderate phenotypic and genotypic coefficient of variation was observed in seed yield per plant and subsequently number of clusters per plant. While low PCV and GCV were observed in days to maturity followed by seed protein content. In the F2 generation, phenotype coefficient of variation (PCV) estimates was higher than genotypic coefficient of variation (GCV) for all traits. The highest phenotypic and genotypic coefficient of variation was observed for the harvest index. A high phenotypic and medium genotypic coefficient of variation was observed for biological yield. Moderate phenotypic and genotypic coefficient of variation was observed in seed yield per plant and subsequently number of clusters per plant. While low PCV and GCV were observed in days to maturity followed by seed protein content. In the F1 generation, high heritability estimates were observed for 100 seed weight, followed by harvest index, biological yield, seed yield per plant, plant height, days to 50% flowering, seed protein content. Medium heritability was observed in number of clusters per plant, number of pods per plant, pod length and number of seeds per pod. Low heritability was observed for the number of branches per plant. High heritability associated with high genetic progress as a percentage of mean was observed for 100 seed weight, biological yield and harvest index. High heritability with moderate genetic progress was observed from days to 50% flowering and plant height. In the F2 generation, high heritability estimates were observed for harvest index followed by seed yield per plant, 100 seed weight, plant height, days to 50% flowering, days to maturity, number of pods per plant and seed protein content. Medium heritability was observed in number of clusters per plant followed by pod length. Low heritability was observed for number of branches per plant followed by number of seeds per pod and biological yield. High heritability associated with high genetic progress as a percentage of mean was observed using harvest index, followed by seed yield per plant, 100 seed weight. High heritability with moderate genetic progress was observed for plant height followed by days to 50% flowering and number of pods per plant and days to maturity. Medium heritability was observed in number of clusters per plant, number of pods per plant, pod length and number of seeds per pod. Low heritability was observed for the number of branches per plant. High heritability associated with high genetic progress as a percentage of mean was observed for 100 seed weight, biological yield and harvest index. High heritability with moderate genetic progress was observed from days to 50% flowering and plant height