Combining ability analysis for yield and fibre quality traits in upland cotton (Gossypium hirsutum L.)

摘要

Present study alms to estimate general combing ability of the parents and specific combining ability of hybrids for yield and fibre quality traits. Three genotypes were crossed with ten genotypes in line x tester fashion. Analysis of variance for combining ability indicated the predominance of non additive variance for all the characters under study except 2.5 per cent span length and fibre strength. BC 68-2 was good general combiner for seed cotton yield/plant and its yield contobuting traits. On the basis of sea effects, the cross combinations of G. Cot. 20 x 76 IH 20, GSHV 155 x LRA 5166, GSHV 155 x GSHV 112, G. Cot. 20 x GSHV 01 /26, GSHV 155 x GISV 103 and GSHV 01/1338 x GISV 218 exhibited highest magnitude of positive significant sea effects for seed cotton yield and its components.