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GrainGenes Reference Report: TAG-99-1075

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Reference	TAG-99-1075
Title	Comparison of methods for calculating the heritability of adult field resistance to yellow rust and grain yield in spring wheat
Journal	Theoretical and Applied Genetics
Year	1999
Volume	99
Pages	1075-1079
Author	Wagoire WW Ortiz R Hill J Stolen O
Abstract	Summary: Several methods are available for estimating heritability in disomic species, including parent-off-spring regression, realized heritability, intraclass correlations of recombinant inbred lines, and diallel-cross analysis. Estimates were obtained by these various methods a set of eight bread wheat (Triticum aestivum) lines adapted to the East African highlands, which had been intercrossed and selfed in a half-diallel arrangement to give F(1), F(2) and F(3) generations, and F(6) recombinant inbred lines. Significant genetic variation existed among parents and crosses for both grain yield and yellow rust resistance in all generations. Based on the heritability calculated from the analysis of F(6) recombinant inbred lines, analysis of the F(2) diallel crosses was recommended for determining the heritability of both characters in early segregating generations. The results also suggest that a form of tandem selection may be effective in developing locally adapted germplasm which combines high grain yield with yellow rust resistance
Keyword	[ Hide all but 1 of 26 ] artificial selection bread crop yield diallel analysis diallel cross analysis diallel crosses disease resistance estimates generation genetic analysis genetic variation germplasm heritability inbred lines narrow sense heritability parent offspring regression plant breeding puccinia striiformis realized heritability resistance rust diseases selfing tandem selection triticum triticum aestivum uganda

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