Genetic Analysis of Yield and its Contributing Traits in Maize (Zea mays L.)
Genetic Analysis of Yield and its Contributing Traits in Maize (Zea mays L.)
Abid Ali1*, Hidayat ur Rahman1, Farhatullah1 and Zahir Shah2
ABSTRACT
Genetic parameters particularly gene action help plant breeders in developing breeding strategies. The experimental material comprised three white maize (Zea mays L.) inbred lines which were developed at Cereal Crops Research Institute (CCRI), Pirsabak, Nowshera-Pakistan. Parental inbred lines were crossed with each other to get six F1s during kharif 2015 which were selfed to develop F2s and backcrossed with their parents to obtain backcrosses BC11 and BC12 generations during spring 2016. The total experimental material in this study consisted of three parental inbred lines, six F1s, six F2s, six BC11, six BC12 and check cultivar P30K08 which were evaluated at two locations i.e. CCRI, Pirsabak, Nowshera and The University of Agriculture (UAP), Peshawar-Pakistan in a RCB design having three replications during kharif, 2016. Generation means analysis (GMA) indicated presence of complementary epistasis in the inheritance of ear leaf area, ear length, grain yield and harvest index. Likewise, duplicate type of epistasis was noted in the controlling of biological yield. Duplicate as well as complementary epistasis were found responsible in controlling the expression of plant and ear height, maturity and stover yield as well. Additive x dominance type of epistasis played major role in the inheritance of ear leaf area, stover yield and harvest index in all crosses. Similarly, in the inheritance of days to silking, ear leaf area, ear length, stover yield, biological yield and harvest index additive epistasis was involved. Based on the findings from this study, crosses SW-491 × EV-157, EV-157 × SW-491 and EV-157 × EV-120 were recommended for subsequent breeding programs.
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