Combining abilities and genetic parameters for grain yield and some agronomic traits in maize (Zea mays L.)

Abstract Background The improvement of maize hybrids relies on significant genetic variability among the inbred lines used and degree to which it is transferred progeny. Understanding parameters heritability traits in every population an essential precondition for selection program. This study was designed estimate magnitude line × tester mating design. Fifteen yellow derived from different sources were crossed with two as i.e., Gm-1001 Gm-1002 2019 summer season. During 2020 season, resulted 30 crosses along check hybrid SC-168 evaluated a yield trial at locations: Gemmeiza Sids Agric. Res. Station. Results mean squares locations highly all studied except KR −1 . L 1 3 had best general combiners GY ard fed In addition, T GCA effects good combiner earliness, shorter plants lower ear placement traits. While 2 grain some attributes. Crosses 5 7 positive SCA yield. variances higher than ED trait, indicating that additive variance played major role non-additive inheritance these Generally, phenotypic coefficient genotypic traits, suggesting there influence by environments expression Recorded percentage broad sense ranged low (ear position%, no. ears/100 plants, diameter yield) medium (days 50% silking, plant height, height kernels/row) moderate high length trait. Conclusion Our investigation concluded most exhibited superior result components