Genotype Environment Interaction, Variability And Correlation Studies in Groundnut (Arachis Hypogaea L.)
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Date
1995
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Birsa Agricultural University, Ranchi
Abstract
The present investigation on the "Genotype x Environment Interaction, Variability and Correlation studies in Groundnut was conducted in a Randomized Block Design for three years under rainfed situation. Thirty diverse groundnut varieties were evaluated for their extent of variability for twelve plant characters and to study the associations of these plant characters with yield and among themselves (both genotypic and phenotypic). The GxE interaction and estimation of stability parameters after Eberhart and Russell's (1966) was done to screen out some suitable stable varieties of groundnut for Chotanagpur region under rainfed condition.
Highly significant differences were observed between the genotypes for almost all the characters over the years. The pooled estimate of phenotypic coefficient of variation and genotypic coefficient of variation were found to be low for oil percentage in kemel, days to maturity and days to 50% flowering. The pooled estimate of genetic advance expressed in percentage of mean was also found to be lowest in oil percentage in kemel followed by days to maturity. Heritability estimate in broad sense pooled over three years was highest for days to 50% flowering. Pod yield showed positive and significant correlation with days to 50% flowering, number of primary branches, 100-kemel weight and days to maturity. None of the plant characters was found to be associated with oil percentage in kemel.