Combining ability of Gossypium hirsutum L. parents for seed oil content
1999
Zhar, F.M. | Ajmal, S.U.K. | Khan, A.I. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Breeding and Genetics)
The mean squares obtained from the analysis of seed-oil content of cotton (Gossypium hirsutum L.) genotypes showed that effects of general combining ability and specific combining ability, and of reciprocals were significant. However the larger proportion of variance was resulted from (gca) effects, indicating that additive genes were predominant in the inheritance of the character. The results suggest that there is a potential for improving oil content in hirsutum species, and rapid progress may be made by following pedigree selection method. The comparison of the parents indicated that 'NIAB 78', 'B 557' and 'Acala 1517' were the best general combiners for oil content. The performance of the parents in their specific combinations suggest that it is not necessary always that good general combiners give good hybrids, sometime parents with low or poor GCA may have the potential to give promising hybrids. The combinations 'NIAB 78' x 'B 557', 'NIAB 78' x 'Acala 1517 A', and 'B 557' x 'Acala 1517 A' had higher values than other crosses for oil content.
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