Nature of gene interaction in the inheritance of grain yield, harvest index and their components characters in rice
1986
Sharma, D.K. | Shrivastava, M.N. | Shrivastava, P.S. (Jawaharlal Nehru Krishi Vishwa Vidyalaya, Raipur campus (India))
Genetic architecture of yield, harvest index and component characters in rice (Oryza sativa Linn.) was studied using generation-mean approach for 7 cross combinations. The epistatic effect (i, j and l) varied in different characters and crosses, and were much less than the mean effects (m). For yield the major component of genetic variation was due to dominance and additive x additive gene effects whereas for harvest index the major contribution was from additive x dominance and dominance x dominance effects. In general additive x dominance (j) was less important in the inheritance of characters. Interaction effects (i and l) were of considerable magnitude indicating that these components may be utilized in developing hybrids. For number of panicles/plant and grains/panicle, additive x additive effects were of higher magnitude than additive x dominance and dominance x dominance components
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