Genetic Parameters of Variation and Character Association for Seed Yield and its Attributes in Mungbean (Vigna radiata L. Wilczek)

Abstract

Background: The yield levels in mung bean reached a plateau, which emphasizes breeding for varieties with improved productivity. The basic requirements of any breeding include the understanding of different genetic parameters of various yield related traits along with the knowledge with regards to interrelationships and cause and effect of those relations among the quantitative traits.Methods: In the present investigation, sixty germplasm lines were evaluated using Augmented Randomized Complete Block Design in respect of eleven quantitative traits for three years i.e., during kharif seasons of 2017-18, 2018-19 and 2019-20 to understand the genetic architecture of different genetic parameters along with associations and their cause and effects of different traits on grain yield.Result: The pooled analysis revealed significant variability for majority of traits. High heritability coupled with high genetic advance was observed in case of pods per plant, clusters per plant, plant height, test weight, seeds per pod, pods per cluster and grain yield indicating probable operation of additive gene action in inheritance of these traits. Clusters per plant and pods per plant which registered high GCV, high heritability and high genetic advance as percent of mean. The association studies revealed significant associations of pods per plant, clusters per plant, pods per cluster, branches per plant, days to maturity, pod length with grain yield per plant at both phenotypic and genotypic levels in desirable direction. Further, it was found that all these six traits which had significant association with yield also established significant magnitude of direct effects in desirable direction which contributed to the significant associations hence, can be considered simultaneously during selection.