Identification of superior parents and hybrids for yield and its components in cotton (Gossypium hirsutum)
2008
Naeem, M. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Breeding and Genetics) | Azhar, F.M. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Breeding and Genetics)
The purpose of this study was to identify superior parental combinations based upon general and specific combining abilities in order to exploit their potential for increasing seed cotton yield. Five cotton lines (NIAB 111, NIAB 999, CIM 448, NINE 93 & FH 901) and three testers (LRA Blight, CP 15/21 & 289 F-1) were crossed according to line x tester mating system. Data on 23 genotypes were recorded on monopodial and sympodial branches, number of bolls, boll weight, seed index and seed cotton yield. The variation due to general combining ability of the parents and specific combining ability of the hybrids for plant yield and its components were estimated by line x tester analysis. Result showed that MNH 93 was the best combiner for most of the traits studied. Variance component analysis indicated that except boll weight, all other characters were predominantly influenced by dominance properties of genes. Three varietal combinations NIAB 999 x CP 15/21, CIM 448 x LRA Blight and MNH 93 x 289 F-1 expressed high specific combining abilities for all characters. Results suggest that the parents may be used in the hybridization program aiming to develop hybrid cotton.
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