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GrainGenes Reference Report: PHY-84-406

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Reference	PHY-84-406
Title	Heritability and number of genes governing adult-plant resistance to powdery mildew in Houser and Redcoat winter wheats
Journal	Phytopathology
Year	1994
Volume	84
Pages	406-409
Author	Das M Griffey C
Abstract	Heritability and number of genes controlling adult-plant resistance to powdery mildew (Blumeria graminis f sp tritici) was studied in three winter wheat (Triticum aestivum L. crosses Parents, F1, F2, F3, and backcross populations were evaluated in the field under naturally occurring inoculum of powdery mildew Number of genes controlling adult-plant resistance in Houser and Redcoat was determined by both qualitative and quantitative methods Mildew severity was used for qualitative estimates, and area under the disease progress curve values were used for quantitative estimates. Adult-plant resistance to powdery mildew in Redcoat and Houser is controlled by two to three genes. Disease reactions of the parents and progenies of resistant X susceptible crosses indicated that resistance in both cultivars is partially dominant and additive. Broad-sense heritability, estimated by the variance components method, ranged from 0.57 to 0.94, while heritability estimated by the standard units method ranged from 0.19 to 0.35. Selection for adult-plant resistance among progeny derived from crosses with Redcoat and Houser would likely be most effective in advanced generations.
Keyword	[ Hide all but 1 of 8 ] crossbreeding erysiphe graminis genes genetic resistance heritability plant breeding plant pathogenic-fungi triticum aestivum

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