Generation mean analysis study for qualitative and quantitative traits in cotton (Gossypium hirsutum L.)
Gene effects for six quantitative and two quality traits were estimated from two upland cotton crosses through generation mean analysis from 6 generations (P1, P2, F1, F2, BC1 and BC2). Results revealed that the dominant gene action was observed in the majority of the traits. The traits, plant height, number of sympodial branches per plant, number of bolls per plant, seed cotton yield per plant, ginning percentage and micronaire value possessed opposite signs of [h] and [l] indicating the role of duplicate gene action controlling the traits which will pose a hindrance to a plant breeder while attempting selection in long run. Therefore, heterosis breeding would be advantageous and none of the studied traits were found to be controlled by the complementary type of interaction. Epistatic gene interactions also showed a significant role in the inheritance of all characters in one or another cross. Both additive and dominant genetic interactions with inter-allelic interactions should be taken into account for varietal improvement, which is the main breeding objective. Reciprocal recurrent bi-parental mating methods would break the undesirable effects.
Keywords: Cotton, gene action, epistasis, fiber quality and generation mean
Generation mean analysis study for qualitative and quantitative traits in cotton Gossypium hirsutum L.. 2023. Electronic Journal of Plant Breeding, 14 3, 1270-1275. Retrieved from https://www.ejplantbreeding.org/index.php/EJPB/article/view/4881
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