Exploring Genetic Variation and Quantitative Parameters in Upland Cotton (Gossypium hirsutum L.) by Diallel Analysis

Khatir Ali; Tehseen Ali Jilani; Noor ul Ain; Jalil Ahmed; Jalal Ahmed

Exploring Genetic Variation and Quantitative Parameters in Upland Cotton (Gossypium hirsutum L.) by Diallel Analysis

Authors

Khatir Ali Department of Plant Breeding and Genetics, Faculty of Agriculture, University of Agriculture Faisalabad, Pakistan
Tehseen Ali Jilani Department of Horticulture, Faculty of Agriculture, Gomal University, DIKhan, Pakistan
Noor ul Ain Institute of Food Science and Nutrition, Faculty of Agriculture, Gomal University, DIKhan, Pakistan
Jalil Ahmed Department of Plant Breeding and Genetics, Faculty of Crop Production, Sindh Agriculture University, Tandojam, Pakistan
Jalal Ahmed Department of Agronomy, Sindh Agriculture University, Tandojam, Pakistan

Keywords:

Upland cotton, , Diallel analysis, , Combining ability, , Gene action, , Yield traits, , Fiber quality.

Abstract

The experiment was intended to examine the cross-breeding capacity on yield and fibre characteristics in upland cotton (Gossypium hirsutum L.) using diallel analysis. A 4 × 4 diallel analysis of the four cotton varieties, viz., Lalazar, MNH-888, FH-154 and FH-175, was crossbred in the season 2023-24. In 2023-24, the hybrids (12) and their parents were planted in three replicas in an RCBD. The parents raised the crossed material, which was also raised in the experimental field of the Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad. The data was taken using five plants of each line being selected randomly, like plant height, the number of bolls in each plant, number of monopodial branches, number of sympodial branches, seed cotton yield, boll weight, lint index and fibre characteristics, fibre length, fibre strength, and fibre fineness. The results of the data obtained were statistically processed according to the methodology of Hayman and Jinks to determine the character of the action of the genes affecting the nature of the yield and fibre traits. It was found that the fibre length, seed cotton yield and the number of monopodial branches showed partial dominance with additive gene action. Overdominance gene action was found to control plant height, number of bolls per plant, lint index, fibre strength and fibre fineness, whereas the number of sympodial branches and boll weight were found to be under total dominance. There was no epistasis whatsoever.

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Exploring Genetic Variation and Quantitative Parameters in Upland Cotton (Gossypium hirsutum L.) by Diallel Analysis