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An experiment was done at Department of Plant Breeding & Genetics, Ghazi University, D. G. Khan to find out genetic effects for some quantitatively inherited plant traits using six generations viz., parents, their first and second filial generations and their backcrosses of two wheat crosses like Mairaj-08 × Blue Silver as cross-I and Faisalabad-08 × DH-60 as cross-II. Through scaling, analysis on generation means was performed and involvement of epistasis was found for many plant traits in both cross combinations. So, a model of six parameters was applied for estimation of nature of genetic interaction in all plant characters excluding 1000-grains weight. Additive gene action was controlling yield and yield related traits in both cross combinations. So, it was found that many plant traits in cross combination like Faisalabad-08 × DH-60 were controlled by additive genetic effects so this cross can be utilized in future wheat improvement program for high yield.
Keywords: Additive gene action; Epistasis; Generation mean analysis; Gene action; Grain yield; Plant traits; Wheat