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GrainGenes Reference Report: IGP-64-69

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Reference	IGP-64-69
Title	Estimation of gene effects for grain yield and its components in barley (Hordeum vulgare L.)
Journal	Indian Journal of Genetics and Plant Breeding
Year	2004
Volume	64
Pages	69-70
Author	Ved P Saini DD Singh RV
Abstract	Gene effects for grain yield and its components (days to maturity, plant height, flag leaf area, tillers per plant, grains per spike) were assessed in the F1, F2, BC1 and BC2 populations of the barley crosses RD 31 x RD 2433, RD 2052 x RD 2407 and RD 2502 x RD 2433 grown in Jaipur, Rajasthan, India. Scaling tests indicated the presence of epistasis for all characters in all three crosses. Generation mean analysis revealed that additive and dominance were significant in the cross RD 2052 x RD 2407 for days to maturity, plant height, flag leaf area and grains per spike. Additive effect was noted for all crosses, except for the cross RD 2052 x RD 2433 for days to maturity and the cross RD 2052 x RD 2407 for tillers per plant. Dominance effect was significant for days to maturity and flag leaf area in all crosses. Dominance effect was significant for plant height and tillers per plant in RD 2052 x RD 2407 and for grain yield per plant in RD 2052 x RD 2433. The relative magnitude of dominance effect was invariably higher than additive effect, indicating the preponderance of non-additive gene action in the inheritance of these characters. All epistatic interactions were significant in the cross RD 31 x RD 2433 for days to maturity, flag leaf area and tillers per plant, and in the crosses RD 2052 x RD 2407 and RD 2052 x RD 2433 for plant height. Only RD 2052 x RD 2407 had significant epistatic effects for grain yield per plant. Additive x additive and dominance x dominance gene interactions were significant for all characters but the latter component was predominant, indicating the major role of non-fixable gene actions in the expression of the characters
Keyword	[ Hide all but 1 of 17 ] agricultural research barley crop yield cross dominance epistasis flag leaf gene interaction genetic effects inheritance leaf area maturation maturity plant breeding plant height tillers yield components

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