Genetic analysis and trait association in F2 populations of four different crosses in pigeonpea (Cajanus cajan L. Millsp.)
DOI:10.37992/2024.1502.035
Abstract
Pigeonpea, a predominant protein source for vast vegetarian population is constrained by numerous biotic and abiotic stresses. Inefficient exploitation of pigeonpea germplasm has limited its utilization. Therefore it is important to identify and select breeding material from germplasm with sufficient genetic variability to utilize in hybridization programmes. In this regard ~200 F2 plants each from four different crosses were evaluated in Kharif-2019 at University of Agricultural Sciences Bengaluru. They were assessed for genetic variability, heritability, genetic advance as per cent of mean and trait association. High phenotypic and genotypic coefficient of variation was noticed for pods plant-1, clusters plant-1 and seed yield plant-1. High heritability coupled with higher genetic advance as per cent mean was noticed for secondary branches plant-1, clusters plant-1 and pods plant-1. Seed yield plant-1 showed highest significant positive correlation with pods plant-1 and clusters plant-1, indicating these traits were the primary yield determinants in pigeonpea. Path coefficient analysis revealed that secondary branches plant-1 showed highest positive direct effect on seed yield plant-1 followed by pods plant-1 and clusters plant-1, thus selection based on these traits would be rewarding. Among the four crosses evaluated, highest numbers of transgressive segregants were identified from the cross BRG-1 × BDN-2 followed by HY3C × BDN-2 for yield and its related traits. The identified transgressive segregants could be evaluated for further exploitation.
Keywords: Genetic variability, heritability, trait association, path coefficient, pigeonpea
Genetic analysis and trait association in F2 populations of four different crosses in pigeonpea Cajanus cajan L. Millsp.
. 2024. Electronic Journal of Plant Breeding, 15 2, 304-312. Retrieved from https://ejplantbreeding.org/index.php/EJPB/article/view/4867It is certified that:
- The corresponding author is fully responsible for any disputes arising due to the publication of his/her manuscript.
- The article has been seen by all the authors who are satisfied with its form and content.
- The sequence of names of authors in the by-line is as per their relative contribution to this experiment, giving due credit to all scientists who made notable contribution to it.
- All the authors fully understand that inclusion of any other co-authors or exclusion of any co-authors is not possible once the article has been submitted to the journal.
- The corresponding author takes full responsibility for this article.
- The address of the organization where the research was conducted is given.
- The article is exclusive for this journal, and the results reported here have not been sent (and will not be sent during its consideration by this journal) for publication in any other journal.
- Authors agree to abide by the objective comments of referees and do agree to modify the article into a short note as per the recommendation, for publication in the Electronic Journal of Plant Breeding.
- If published in Electronic Journal of Plant Breeding, the copyright of this article would vest with the Indian Society of Plant Breeders, who will have the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in it, and neither we nor our legal heirs will have any claims on royalty.