Himachal Journal of Agricultural Research

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Gene Action and Combining Ability for Yield and its Component Traits of Rice in Upland Condition of Himachal Pradesh


Affiliations
1 CSK Himachal Pradesh Krishi Vishvavidyalaya Rice and Wheat Research Centre, Malan-176 047, India
 

Research was carried out to determine the study of gene action and combining ability in rice. The material consisted of F2 population of 33 crosses developed by crossing genotypes with three testers. The crosses were made at RWRC, Malan during kharif 2018 and during kharif 2019 the (33) F2 materials along with parental lines (11) + testers (3) were evaluated in RBD with three replications at RWRC, Malan. Magnitude of dominance genetic variance σ2D was found to be higher than that of additive genetic variance σ2A for plant height, total tillers/plant, effective tillers/plant, panicle length, spikelets/panicle, grains/panicle, spikelet fertility, grain yield/plant, 1000-grain weight. Average degree of dominance was observed more than one for all the traits studied except days to 50% flowering, days to maturity, grain length, grain breadth and L:B ratio.

Keywords

Oryza sativa, Gene Action, General Combining Ability, Specific Combining Ability.
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  • Gene Action and Combining Ability for Yield and its Component Traits of Rice in Upland Condition of Himachal Pradesh

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Authors

Akshay Sharma
CSK Himachal Pradesh Krishi Vishvavidyalaya Rice and Wheat Research Centre, Malan-176 047, India
D. P. Pandey
CSK Himachal Pradesh Krishi Vishvavidyalaya Rice and Wheat Research Centre, Malan-176 047, India

Abstract


Research was carried out to determine the study of gene action and combining ability in rice. The material consisted of F2 population of 33 crosses developed by crossing genotypes with three testers. The crosses were made at RWRC, Malan during kharif 2018 and during kharif 2019 the (33) F2 materials along with parental lines (11) + testers (3) were evaluated in RBD with three replications at RWRC, Malan. Magnitude of dominance genetic variance σ2D was found to be higher than that of additive genetic variance σ2A for plant height, total tillers/plant, effective tillers/plant, panicle length, spikelets/panicle, grains/panicle, spikelet fertility, grain yield/plant, 1000-grain weight. Average degree of dominance was observed more than one for all the traits studied except days to 50% flowering, days to maturity, grain length, grain breadth and L:B ratio.

Keywords


Oryza sativa, Gene Action, General Combining Ability, Specific Combining Ability.

References