Study of Genetic Diversity in Greengram (Vigna radiata (L.) Wilczek) Germplasm in Prayagraj Region

Abstract

The present study consists of 41 Greengram genotypes including one Check variety used to study the nature and magnitude of genetic divergence using Mahalanobsi’s D2 statistics. The data for 13 quantitative characters recorded from the genotypes raised in Randomized Block Design having three replications at Department of Genetics and Plant Breeding, SHUATS, Prayagraj, Uttar Pradesh, India during Kharif-2021. 13 quantitative characters viz., Days to 50% flowering, Days to 50% pod setting, Days to maturity, Number of clusters per plant, Number of primary branches, Plant height (cm), Number of pods per plant, pod length (cm), Biological yield per plant (g), Number of seeds per pod, Harvest index (%), Seed yield per plant(g), Seed index to estimate the variability, heritability, genetic advance, genetic diversity among yield. SML-668 (14.96 g) has the highest Seed yield followed by IPM-205-7 (13.48 g), IPM-410-03913.21 g) showed the higher yield over the SM-20-29 (Check). Maximum (GCV), (PCV), Heritability was recorded for Number of primary branches. High Heritability coupled with high Genetic advance was recorded for Plant height (cm). Divergence analysis followed by Mahalanobis [1] D2 analysis has revealed the presence of a substantial amount of diversity among the genotypes. Clusters I contain 19 genotypes followed by Clusters II contain 18 genotypes while Clusters III, IV, V, VI are mono genotypic. The maximum inter-cluster distance was observed between Cluster IV and VI (290.82) followed by Cluster IV and V (238.70). Thus, genotypes present in these clusters suggest that the genetic architecture of the genotypes in one cluster differ from another cluster which provides a broad spectrum of variability in segregation and may be used as parents in the future hybridization programme to develop desirable genotypes.