Original Research Article Genetic Diversity and Association Analysis for Agronomic and Yield Related Traits in Interspecific Progenies of Pigeonpea (Cajanus cajan)

Abstract

The limited genetic diversity in existing cultivars emphasizes the need for incorporating potential exotics and wild relatives in breeding programs. This study focussed on assessing genetic variation and correlations among yield traits in F8 and F9 progenies resulting from nine interspecific crosses, involving three cultivated parental lines and three wild species. Results indicate significant genotypic variation for all traits studied. Phenotypic and genotypic coefficients of variation varied across agronomic parameters. Heritability estimates ranged from 22.61% (Primary branches plant-1) to 89.35% (Days to maturity) for different traits, emphasizing the potential for selection in breeding programs. Positive correlations were observed among various traits in both progeny generations, providing insights into the interplay of genetic factors influencing pigeon pea traits. The cluster analysis revealed that, 54 interspecific cross derived lines with three parents were grouped into four clusters, indicating the greater diversity among the lines for the selection of yield related traits for pigeonpea crop improvement.