Genetic Variability and Stability Analysis in Greengram [Vigna radiata (L.) Wilczek]

Abstract

In this study experiments were conducted to assess the genetic variability and stability using twenty five genotypes at CRC, Sardar Vallabhbhai Patel University of Agriculture and Technology Meerut in RBD with three replication on different dates of sowing kharif 2019. Analysis of variance showed significant amount of variability for all traits under study. High GCV and PCV were observed for harvest index and number of pods per plant. High heritability was observed for seed yield per plant followed by biological yield per plant harvest index, test weight, plant height, number of pods per cluster, number of pods per plant, pod length, days to maturity, number of clusters per plant, days to 50% flowering and number of seeds per pod. High heritability coupled with high genetic advance was recorded in plant height, showing that heritability might be due to additive gene effects and direct selection for this trait may be useful. Genotypic correlation coefficients were higher in magnitude than the phenotypic correlation coefficients in all the traits under study. Seed yield showed positive and significant correlation with harvest index, test weight and number of pods per plant both genotypic and phenotypic level. Path coefficient analysis showed that among the various yield contributing traits viz; harvest index followed by biological yield per plant, plant height, days to maturity, number of pods per plant, test weight, number of pods per cluster and number of seeds per pod on seed yield. The stability analysis revealed significant differences for genotypes, sowing conditions and their interactions for almost traits including seed yield per plant. The orthogonal partitioning of components also significant in this stability model. Considering all traits and conditions under study none of the test genotypes were found stable for all the traits. However seven genotypes namely; Pusa 371, HUM 12, Pusa 672, Pusa Baisakhi, ML 1451, WGG 37 and BDRY 1 were found stable for maximum traits while rest genotypes may be suitable for favorable and other conditions in present study.