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 |
The present study was conducted at three locations during kharif 2014-15 with 72 inter-specific hybrids along with their parents and two standard checks to elicit information on combining ability effects, gene action and heterosis of inter-specific hybrids over environments for yield and yield components. The pooled combining ability analysis of variance showed significant differences due to locations, parents, hybrids and various interactions indicating the existence of sufficient variation in the material under study. The gca and sca variances indicated the presence of additive gene action for number of bolls plant-1, seed index and seed cotton yield plant-1 whereas, days to 50% flowering, plant height, number of monopodia plant-1, number of sympodia plant-1, lint index and ginning out-turn were controlled by non-additive gene action. Both additive and non-additive gene actions were involved in the inheritance of boll weight. None of the line and tester was found to exhibit significant gca effects for all the characters studied. The lines, NDLH 1938, H 1442, ADB 542, ADB 532, MR 786, BS 37, L 762 and testers, GSB 40, DB 16, DB 11 and GSB 41, were found to be promising general combiners for seed cotton yield plant-1 and other traits. Significant and desirable sca effects for seed cotton yield plant-1 were exhibited by 22 hybrids. Based on per se performance, sca effects and standard heterosis, three cross combinations viz., H 1442 × GSB 41, H 1442 × DB 16 and TSH 0250 × GSB 40, were identified as superior for seed cotton yield plant-1. Hence, these hybrids may also be considered for evaluation over more locations, seasons and years before they are being exploited commercially.
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