Assessment of Genetic Variability and Association Analysis for Yield Traits in Mungbean Accessions in South Eastern Rajasthan

Abstract

This study was focused on assessing the genetic variability and association analysis for yield traits among the accessions of mungbean. Ninety-four accessions of mungbean including four checks were evaluated in an Augmented Randomized Complete Block Design during Summer 2024 at ARS, Kota, Rajasthan. Significant differences were observed among the accessions (Genotypes + Checks) for the studied traits. A wide range of variation was noted for most of the traits. Phenotypic coefficient of variance value for most of traits were closely matched to the corresponding genotypic coefficient of variance, indicating less environmental influence on their expression. High heritability coupled with genetic advance as percentage of mean was observed for traits viz., number of clusters per plant, seed yield per plant, plant height, number of pods per plant, biological yield per plant and 100 seed weight suggesting these traits would respond to better selection. Seed yield per plant showed a significant positive association with harvest index (0.764;0.765), number of clusters per plant (0.577;0.550), biological yield per plant (0.554;0.525), number of pods per plant (0.524;0.497), number of seeds per pod (0.294;0.298) and pod length (0.256;0.224) at genotypic and phenotypic levels. These traits are suggested as key selection criteria for improving yield in mungbean.