Genetic architecture of yield and quality traits in wheat (Triticum aestivum L.)

Abstract

The aim of this study was to investigate gene effects and genetic variability by generation mean analysis for some yield and quality traits in three diverse crosses of wheat (JW 3288 × HD 8864, MP 3269 x GW 173 andJW 3020 × GW 366). The parents P1 and P1 and F1, F2, BC1 and BC2 populations were grown in a randomized complete block design with three replications during 2017-2018 crop seasons. Both additive and non-additive gene effects were involved in the expression of days to ear emergence, plant height, days to maturity, number of grains per spike, grain yield, flour recovery, husk content, protein content, lysine content and amylose content. The epistatic interaction was observed for all the ten traits in said crosses. In general, magnitude of dominance effect (h) has a greater value than additive effect (d) in all the traits. Digenic interaction indicated complex nature of inheritance means non-additive gene action. The improvement by selection in early generation could be advisable.