Phenotypic Diversity among the Virginia Breeding Lines of Groundnut

Authors : K GANGADHARA, H K GOR

Pages : 108-117

View : 10 | Download : 4

Publication Date : 2022-07-31

Article Type : Research Paper

Abstract :An attempt has been made to study the genetic variability and classifying the 210 Virginia breeding lines along with five checks evaluated across two years. Significant differences observed among Virginia breeding lines for all traits except days to maturity. Moderate heritability coupled with high genetic advance as per cent of mean for hundred pod weight and hundred kernel weight suggesting the additive gene control and effectiveness for selection. Low heritability coupled with low genetic advance as per cent of mean for days to flowering and kernel characteristics suggests more environmental influence on their expression. Pod yield per plant correlated significantly and positively with primary branches per plant, hundred pod weight and kernel weight, SMK, shelling out turn, kernel length and kernel width. Cluster analysis based on Euclidean distance using Wards criteria, grouped 210 Virginia bunch breeding lines and four checks into three major clusters. Three major clusters consist each of 119 breeding lines in cluster I, 44 breeding lines and three checks in cluster II and 47 breeding lines and two check varieties in cluster III, respectively. Cluster I and cluster II contains high yielding breeding lines, where as cluster III had low yielding breeding lines. Sub cluster IIA had breeding lines with higher pod yield and kernel characteristics, which will be useful donors for Virginia groundnut improvement.
Keywords : Phenotypic diversity, Virginia breeding lines, hundred kernel weight, cluster analysis