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HERITABILITY ANALYSIS OF YIELD AND QUALITY COMPONENTS IN GOSSYPIUM HIRSUTUM L.

A.S. LARIK, S.R. ANSARI AND M.B. KUMBHAR

Abstract: Studies on genotypic and phenotypic variance, heritability and expected genetic advance for G.O.T. %, staple length, lint index, fibre strength, fibre fineness and seed cotton yield in 10 genotypes of Gossypium hirsutum L, indicated that these estimates varied considerably within traits studied. The magnitude of genetic and phenotypic variance ranged between 0.032 (fibre fineness) to 407.34 (seed cotton yield). Heritability in broad sense showed high estimates (ranging from 89.75 % to 99.74%) for all the characters, indicating the involvement of additive type of gene action. G.O.T %, staple length and fibre fineness exhibited low genetic advances irrespective of their high heritability estimates, probably due to non-additive gene (dominance and epistasis) effects.

Department of Plant Breeding and Genetics, Sindh Agriculture University, Tandojam- 70060, Pakistan.