Gene effects and interaction' analysis for forage yield and quantitative traits in genus Avena

Abstract

Six generations (P1, P2, F1, F2, 81 and 82) of six crosses involving four diverse parents of oats viz., PLP 1, PLP 9. PO 22 and JHO 822 were evaluated for various yield and morphological traits in a compact family randomized block design with two replications at Palampur. The data of six generations were subjected to scaling tests to analyse genetic parameters m, d, h, i, j and I and to detect epistasis. The predominant role of dominant genic effects was observed for most of the traits studied in one or the other cross. In some of the cases, both dominance as well as additive genic effects were present. Plant height at 50 % flowering showed mainly additive genic effect in three of the six crosses. The type of gene action was observed to be trait cross specific. PLP 1 x PLP 9 showed positive heterosis for fresh forage yield and grain yield and the cross JHO 822 x P022 showed positive heterosis for fresh forage yield and dry matter yield. Crosses PLP 1 x PLP 9 and JHO 822 x PO 22 have been observed to be the potential crosses for yield. The cross, PO 22 x PLP 9 can be utilized for developing dual purpose types.