Combining Ability and Heritability Analysis for Early Maturity and Yield Traits in Contemporary Spring Wheat (Triticum aestivum L.)

An experiment was carried out with North Carolina Mating Design II (NC II) derived F1 progenies along parents to know nature of gene action in regulating early maturity, yield and contributing traits. The principal objective this research identify best specific cross combinations based on combining ability analysis estimation heritability. Hybrids their were arranged a 8 by partially balanced lattice design two replicates. Kanchan, BARI Gom-25 × Gom-21, Gom-26 Rawal Gom-22 Gom-23 Kheri showed earliness Gom-21 highest potentiality. genotypes Gom-28 Gom-30 used as checks the selected performed comparatively better than checks. genetic exhibited significant additive non-additive variations for all For potentiality variance due SCA highly GCA. Heritability estimates revealed low broad sense heritability except traits i.e. days 50% flowering, 100% plant height 100-grain weight, which medium Narrow GCA effect 15 parental insignificant that assessed. x Gom-27, Gom-28, Gom-27 effects earliness. Gom-22, CB51