Author(s):

VN Chinchane, K Duomai and HV Kalpande

Abstract: Combining ability studies was conducted in 24 cross combinations by using 6 lines and 4 testers in cotton. The analysis of variance for combining ability revealed significant differences among the genotypes. Combining ability analysis helps in the evaluation of inbreds in terms of their genetic value and in the selection of suitable parents for hybridization. It also helps in the identification of superior cross combinations. The study revealed that lines and tester showed wide variation for most of the characters indicating their diversity. The estimates of specific combining ability effects revealed that of 24 crosses were having significantly desirable sca effects. The best sca effects and the highest per se performance was noted in the crosses PA741 X JLA 505, PA 710 X AKA 7, PA 760 X CINA 363 and PA 740 X RAC 024. The parental combination in aforesaid cross combinations is either high x high gca, high x low gca, low x high gca. Therefore, it appeared that for getting good cross combination at least one of the parents should have good gca effect.

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