National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Interspecific hybrids of hirsutum and barbadense are known for high productivity and fibre quality. Estimation of combining ability of a line or inbred is useful for predicting its useful as parent in hybrid breeding. The analysis of general and specific combining ability aids in identification of potential parents for production of superior hybrids. General and specific combining ability effects were estimated for eight lines, four testers and their 32 hybrids. The results of the present investigation on combining ability effects revealed that among the hirsutum lines, DHMS is a good general combiner for most of the characters viz., seed cotton yield, lint yield, number of bolls per plant, boll weight, number of sympodia, sympodial length at 50 per cent plant height, ginning outturn (%) with significant positive gca effects. Another hirsutum line DH2572 exhibited significant gca effects for seed cotton yield and lint yield. Among the barbadense testers, DB534 exhibited significant gca effects for most of the characters viz., seed cotton yield, lint yield, boll weight plant height and number of sympodia while the tester SNICB75-10 exhibited significant gca effects for seed cotton yield, lint yield and plant height. Among the crosses, the cross DHMS x SNICB75-10 and DH2572 x SNICB75-10 recorded significant sca effects for seed cotton yield, lint yield, number of bolls per plant, number of sympodia, sympodial length at 50 per cent plant height and SPAD meter reading confirming the role of non-additive effects in governing inheritance of these quantitative characters in these crosses which can be exploited by hybrid breeding.
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