Genetic variability, Correlation and path analysis for yield and its contributing traits in Greengram [Vigna radiata (L) Wilczek.]

Abstract

The present investigation entitled, "Genetic variability and correlation analysis for yield & its contributing traits in Greengram [Vigna radiata (L.) Wilczek.]" involving thirty two genotypes of f2 popuplation was undertaken to examine the genetic variability, heritability, genetic advance, correlation coefficient and path coefficient analysis. All the thirty two greengram genotypes were tested in randomized block design with 3 replications during kharif 2012. Observations were recorded for days to 50% flowering, days to maturity, clusters per plant, pods per plant, plant height (em), pod length (em), seeds per pod, pods per clusters, branches per plant, 100-seed weight (g), biological yield per plant (g), seed yield per plant (g) and harvest index. Analysis of variance revealed substantial amount of variability among the genotypes for all the characters, under study except clusters per plant indicated wide spectrum of variability among the genotypes. High heritability coupled with high genetic advance were observed for harvest index, biological yield per plant, seed yield per plant and pods per plant. Improvement in yield can be made by selecting these yield contributed traits having high heritability coupled with high genetic advance. The genotypic correlation in general was recorded to be higher than that of phenotypic correlation in most of the character combination. Seed yield was found to be positive and significantly correlated with pods per plant, pod length, pods per cluster, branches per plant, 1 00-seed weight, and harvest index. Thus any selection based on these characters will enhance performance and improvement in greengram. Path coefficient analysis showed that pods per plant, plant height, branches per plant, biological yield per plant, pods per cluster, pod length, 1 00-seed weight, harvest index, clusters per plant, days to maturity and days to flowering were the most important characters, controlling directly to seed yield and pods per plant, pod length, pods per cluster, branches per plant, 1 00-seed weight, biological yield and harvest index indirectly, therefore in order to exercise a suitable selection programme it would be worth to concentrate on these characters.