Co-heritability and correlation of yield and associated characters in winged bean (Psophocarpus tetragonolobus L.DC.)

Estimation of co-heritability and correlation between yield and its associating characters was evaluated in twenty three genotypes of winged bean (Psophocarpus tetragonolobus L.DC.). The results from co-heritability studies revelaed that character pairs viz., days to 50% flowering with pod length, dry pod weight, pod yield/plant, protein content and seed yield/plant indicates the joint selection for these characters. Correlation coefficient studies reported that seed yield/plant had the highest estimates of positive correlation and significance, both at genotypic and phenotypic level, with days to 50% flowering (0.408, 0.344), days to maturity (0.330, 0.285), secondary branches/plant (0.321, 0.350), biological yield/plant (0.453, 0.400), 100 seed weight (0.333, 0.294), dry pod weight (0.300, 0.266) and pod yield/plant (0.377, 0.355). These characters, thus, would be advantageous for increasing yield in winged bean.