Gene action for seed yield and its attributing traits in fieldpea (Pisum sativum L.)

Abstract

Generation mean analyses were performed to estimate the nature and magnitude of gene action for yield and its component traits in six generations (P1, P2, F1, F2, B1 and B2) obtained from two crosses (GP 02/1108 x HFP 920 and GP 02/1108 x HFP 9907B). A considerable amount of variation was observed among parents and different generations. Individual Scaling and Joint Scaling test depicted failure of additive-dominance model for all the characters except the number of primary branches in both crosses. Six parameter model revealed a remarkable amount of fixable component though non fixable component was on a higher side in the majority of characters in both the crosses. Sufficient fixable component for the traits envisaged practising pedigree method. However, to exploit additive as well as non-additive gene effects simultaneously breeding methods like a selection from delayed generations and the bi-parental mating approach are advocated.

Keywords

• gene action
• generation means analysis
• fieldpea