Indian Journal of Genetics and Plant Breeding (The)
Year : 1981, Volume : 41, Issue : 1
First page : ( 130) Last page : ( 136)
Print ISSN : 0019-5200. Online ISSN : 0975-6906.

Genetics of yield in Indian mustard

Singh A. B., Chauhan Y. S., Singh P.

Department of Plant Breeding and Genetics, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur-208 002, India

Summary

The inheritance of 8 quantitative characters was studied in three crosses of Indian mustard. Additive gene effects were found having larger contribution than dominant gene effects in the inheritance of days to flower, primary branches (crosses RL 18 × Varuna and Varuna × Appressed mutant) while dominance gene effects were higher than additive effects for secondary branches, siliquae on main raceme, seeds per siliqua, plant height (crosses RL 18 × Varuna and Varuna × Appressed Mutant), length of main raceme (crosses RL 18 × Varuna and Varuna × Appressed Mutant) and yield per plant.

Epistatic gene effects were found important for seeds per siliqua, primary branches and secondary branches. They were relatively more important than dominance gene effects for days to flower siliquae on main raceme, plant height, length of main raceme and yield per plant. Additive × additive and dominance × dominance gene effects were found to play a major role. The existence of appreciable additive × additive gene effects in naost of the characters studied reflects the possibility of making effective improvement in these characters by selection. Duplicate epistasis was found to be involved for all the characters except days to flower in combined analysis.

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