Gene effects of pod yield and its components in three crosses of groundnut (Arachis hypogaea L.)

Abstract

Groundnut, (Arachis hypogaea L.) is a major source of vegetable oil and protein and also a major source of fodder crop. Genetic systems thatcontrol the expression of quantitative traits facilitate the choice of the most efficient breeding and selection procedure. Generation mean analysis is commonlyused in studies of inheritance of quantitative traits. Four groundnut genotypes which consist of three late leaf spot and rust resistant genotypes viz., COG 0437,COG 0438 and ICGV 97150 and one susceptible genotype TMV 2 were used in the present study. The cross TMV 2 x ICGV 97150 had additivegene action for most of the traits viz., plant height, number of pods per plant, pod yield per plant, kernel yield per plant, hundred kernel weightand shelling percentage. Hence, early generation selection could be practiced in TMV 2 x ICGV 97150. However due to the presence of epistasis,especially for rust and LLS incidence in other two crosses viz., TMV 2 x COG 0437 and TMV 2 x COG 0438, selection should be postponed tolater generations.

Keywords

• Groundnut
• generation mean analysis
• additive and dominance gene effects
• epistasis