Abstract
For exploitation of the yield components to to formulate a selection criteria, eighteen diverse type of mungbean genotypes from different countries under IAEA/RCA project were planted in 3 repeats having a plot size of 7.2 m2 . Data pertaining to different morphological attributes viz. days to flower, days to mature, plant height, clusters per plant, pods per plant, pod length, seeds per pod, biomass yield, seed yield, thousand seed weight and harvest index were recorded. Genetic parameters, correlation and direct and indirect effects of these traits were computed. Highly significant differences among the lines/ varieties were observed for all the traits except seeds per pod. Phenotypic co-efficient of variability was generally higher than corresponding genotypic co-efficient of variability. More than 50% heritability values were also observed for all the traits except seeds per pod. Maximum genetic advance was observed for cluster per plant (50.03) followed by biomass yield (45.78) and seed yield (44.68). It means additive type of genes mainly control such characters. Very low genetic advance was observed in case of seeds per pod (1.53) and harvest index (2.89). It means these traits are governed by non-additive type of genes. Seed yield had positive genotypic and phenotypic correlations with all the traits. Pod length and biomass showed highest positive direct effects along with positive genotypic correlation coefficient. Hence these characters may be taken directly for the improvement of seed yield in mungbean.
