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 |
Thirty castor hybrids were developed by crossing three pistillate lines with ten male parents in a line × tester mating design during rabi, 2016-17. The hybrids along parents were evaluated during kharif, 2017-18 for variability and combining ability. The analysis of variance for nine economically important characters indicated significant differences among the genotypes, implying presence of wide diversity in the material studied. High heritability (broad sense) estimates were observed for all the traits under study which showed that the variability in phenotypic expression reflects the genotypic ability to transmit the genes to their offspring. The character seed yield recorded high heritability coupled with high genetic advance as per cent of mean signifying that improvement of seed yield can be achieved by adopting simple selection procedures through which additive genes can be pyramided. Relative magnitude of general and specific combining ability variances indicated that additive genetic action was predominant in governing the traits days to maturity and 100 seed weight. Non-additive gene action was predominant for the traits days to 50 per cent flowering, number of nodes up to primary spike, plant height, primary spike length, number of spikes per plant, seed yield per plant and oil content. Four lines viz., DPC-9, PCS-124, SKI-215 and JC-12 were observed to be good combiners as indicated by their significant positive gca effects for many characters. Four hybrid combinations viz., DPC-9 x PCS-124, DPC-9 x SKI-215, DPC-9 x PCS-106 and DPC-9 x JC-12 were identified as promising based on their sca estimates and per se performance.
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