Genetic Characterization for Dominant, Additive and Epistatic Variations in Gossypium Hirsutum L.

G. AHMAD, S. A. MALIK, R. IQBAL, Z. MEHMOOD

Abstract


The choice of an effective breeding procedure mainly depends upon the knowledge of genetic mechanism involved in the inheritance of different traits. The purpose of present research is to evaluate the quantitative traits gene action heritability in nine crosses developed by using six parents. Six generations (BC1, 2 P1, P2 and F1, F2) have been and subjected for generation mean analysis. Results of the study keep epistatic, additive and dominant gene effects were more important for plant height and ginning out turn while, gene additive effects found to be predominant for controlling inheritance number of sympodial branches per plant, cotton seed production in plants fiber fineness and length. In case of boll weight and number of bolls per plant additive as well as dominant gene effects were prevalent. In addition to this, low to high broad sense heritability estimates (30-93%) were found for all traits. Combining the information obtained by the generation mean analysis and heritability estimates, it is concluded that mostly traits were genetically determined and this genetic material could open the new avenue for cotton breeder to develop the elite cotton genotypes.

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