Phenotypic Diversity among the Virginia Breeding Lines of Groundnut

Year 2022, Volume: 8 Issue: 2, 108 - 117, 31.07.2022

K Gangadhara H K Gor

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

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