NDLI: Genetic characterization of powdery mildew resistance in U.S. hard winter wheat

Content Provider	Springer Nature Link
Author	Chen, Yihua Hunger, Robert M. Carver, Brett F. Zhang, Hailin Yan, Liuling
Copyright Year	2009
Abstract	Powdery mildew significantly affects grain yield and end-use quality of winter wheat in the southern Great Plains. Employing resistance resources in locally adapted cultivars is the most effective means to control powdery mildew. Two types of powdery mildew resistance exist in wheat cultivars, i.e., qualitative and quantitative. Qualitative resistance is controlled by major genes, is race-specific, is not durable, and is effective in seedlings and in adult plants. Quantitative resistance is controlled by minor genes, is non-race-specific, is durable, and is predominantly effective in adult plants. In this study, we found that the segregation of powdery mildew resistance in a population of recombinant inbred lines developed from a cross between the susceptible cultivar Jagger and the resistant cultivar 2174 was controlled by a major QTL on the short arm of chromosome 1A and modified by four minor QTLs on chromosomes 1B, 3B, 4A, and 6D. The major QTL was mapped to the genomic region where the Pm3 gene resides. Using specific PCR markers for seven Pm3 alleles, 2174 was found to carry the Pm3a allele. Pm3a explained 61% of the total phenotypic variation in disease reaction observed among seedlings inoculated in the greenhouse and adult plants grown in the field and subjected to natural disease pressure. The resistant Pm3a allele was present among 4 of 31 cultivars currently being produced in the southern Great Plains. The genetic effects of several minor loci varied with different developmental stages and environments. Molecular markers associated with these genetic loci would facilitate incorporating genetic resistance to powdery mildew into improved winter wheat cultivars.
Starting Page	141
Ending Page	152
Page Count	12
File Format	PDF
ISSN	13803743
Journal	Molecular Breeding
Volume Number	24
Issue Number	2
e-ISSN	15729788
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-03-27
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Powdery mildew Pm3 Qualitative and quantitative resistance Molecular markers Genetic mapping Biotechnology Plant Physiology Plant Sciences Plant Pathology Plant Genetics & Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Molecular Biology Biotechnology Agronomy and Crop Science

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