Combining Ability Analysis in Sesame (Sesamum indicum L.)

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Research Paper 01/09/2016
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Combining Ability Analysis in Sesame (Sesamum indicum L.)

Swapan K. Tripathy, D. R. Mishra, G. B. Dash, N. Senapati, D. Mishra, P. K. Nayak, S. K. Mohanty, S. Dash, Kartik Pradhan, D. Swain, P. M. Mohapatra, S. Panda, M. R. Mohanty
Int. J. Biosci.9( 3), 114-121, September 2016.
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India shares largest area under sesame and ranked second largest producer of sesame seeds in the world. Sesame seeds contain about 50-60% oil and it is considered as the queen of high quality vegetable oils. A diallel analysis was therefore carried out involving 12 diverse parental genotypes of sesame to study gene action and select appropriate parents/crosses using combining ability analysis. The magnitude of GCA effects were invariably higher than SCA effects for all characters  including seed yield and oil content indicating preponderance of additive gene action for inheritance of the traits. TMV 5 had significantly higher number of primary branches/plant along with maximum number of capsules/plant while, CST 785 revealed highest productivity with high oil content. Phule Til-1, E8, CST 785 and Pratap were the favourably good general combiner for seed yield While, Pratap, TMV 5 and Phule Til 1 had higher estimates of general combining ability for oil content. Pratap x RT103, CST 785 x E8, BS 5-18-6 x Phule Til-1 revealed high SCA effect for seed yield. Each of these above cross combinations had at least one parent with high GCA. In contrast, B67xE8, B67xRT 103 and RT 103xT13 were good specific combiner for oil content where none of the parents with high GCA for oil content is involved indicating role of dominance and epistatic gene interaction for oil content in these crosses. The above cross combinations may be useful for genetic improvement of seed yield and oil content.


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