Original Research Article Genetic Diversity and Association Analysis for Agronomic and Yield Related Traits in Interspecific Progenies of Pigeonpea (Cajanus cajan)
Mahadeva Swamy HK *
ICAR- Sugarcane Breeding Institute, Coimbatore -641 007, India and G. B. Pant University of Agriculture and Technology, Pantnagar -263 145, India.
Amaresh
ICAR- Sugarcane Breeding Institute, Coimbatore -641 007, India.
Aswini Nunavath
ICAR- National Institute of Biotic Stress Management, Raipur -493 225, India.
Bajpai GC
G. B. Pant University of Agriculture and Technology, Pantnagar -263 145, India.
Verma SK
G. B. Pant University of Agriculture and Technology, Pantnagar -263 145, India.
Gopalareddy K
ICAR- Sugarcane Breeding Institute, Coimbatore -641 007, India.
Maruthi RT
ICAR- Sugarcane Breeding Institute, Coimbatore -641 007, India.
Sreenivas V
ICAR- Sugarcane Breeding Institute, Coimbatore -641 007, India.
Chandana Behera
Odisha University of Agriculture & Technology, Bhubaneswar -751 003, India.
*Author to whom correspondence should be addressed.
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.
Keywords: Cluster analysis, correlation, genetic diversity, pigeon pea, variability, wild species, inter-specific cross