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Nineteen advance breeding lines of groundnut were evaluated in randomized block design with three replications for variability, heritability and genetic advance during kharif 2018. Observations on eight characters were recorded. Analysis of variance revealed significant differences among the genotypes for all the characters. High GCV accompanied by high heritability and high GAM were obtained for dry pod yield and kernel yield indicating predominant role of additive gene action and amenability for phenotypic selection. High heritability accompanied by low GCV and moderate GAM were obtained for Shelling % indicating major role of non additive gene action and it was not responsive for phenotypic selection. Moderate heritability and low GCV, GAM were registered for Days to maturity and sound mature kernel % indicating that additive and non-additive gene actions have a role in their inheritance and phenotypic selection would be effective to some extent. low heritability and low GAM were registered for days to 50% flowering, 100 kernel weight and dry haulm yield indicating that role of environment on the expression of above characters which cannot be effective for selection.

Keywords: Genetic variability, Heritability, Genetic advance as percentage of mean and Groundnut.