Biometrical analysis of some metrical traits of Gossypium hirsutum L. combining ability
1995
Keerio, M.D. | Kalwar, M.S. | Memon, M.I. | Soomro, Z.A. (Sindh Agriculture Univ., Tandojam (Pakistan). Dept. of Plant Breeding and Genetics)
An experiment was conducted to estimate the combining ability in 8 cultivars of G. hirsutum L. General combining ability (GCA) mean squares for testers were significant for boll number only, whereas GCA for lines and SCA for hybrids were highly significant for boll number and seed cotton yield. The larger proportion of variance for GCA revealed that the nature of gene action was predominantly additive for these traits. S-12 for boll number and seed cotton yield. CRIS-7A for sympodia, boll number and seed cotton yield, and CYTO-127 and CYTO-130 for seed cotton yield proved to be the best general combiners. The crosses S-12 x CYTO-127 and BH-36 x CRIS-54 manifested highly significant SCA effects for boll number and seed cotton yield per plant.
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