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 |
Major improvement in sunflower breeding requires heterotic hybrids which can be achieved by tapping combining ability of F1 hybrids developed from crossing of two genetically diverse female lines with male testers. In the present study, 56 hybrids were evaluated derived from four lines and fourteen testers’ crosses in a line × tester mating design. The analysis of variance revealed existence of highly significant differences (p=0.05) among genotypes, parents and parents vs crosses indicating the presence of heterosis for quantitative traits in sunflower. The parental lines CMS-A6 and CMS-A2 and testers DOR-R3 and R-1F proved to be good combiners having the highest positive General Combing Ability (GCA) effect for yield (5.491**) and yield components traits and negative effect for days to 50% flowering (-1.482**) and plant height (-15.71**). The crosses CMS-A5 x R-103, CMS-A6 x R-103, CMS-A6 x R-7 and CMS-A1 x RGM-49 are promising hybrid combinations for seed yield as indicated by significant Specific Combing Ability (SCA) effects. These identified four hybrids can be taken to multi-location trials for further evaluation.
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