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CC BY V4.0, Open Access
Journal article
A mutagenesis-derived broad-spectrum disease resistance locus in wheat
Theoretical and applied genetics, Vol.125(2), pp.391-404
07/2012
Handle:
https://hdl.handle.net/2376/109475
PMCID: PMC3374107
PMID: 22446929
Abstract
Wheat leaf rust, stem rust, stripe rust, and powdery mildew caused by the fungal pathogens Puccinia triticina , P. graminis f. sp. tritici , P. striiformis f. sp. tritici , and Blumeria graminis f. sp. tritici , respectively, are destructive diseases of wheat worldwide. Breeding durable disease resistance cultivars rely largely on continually introgressing new resistance genes, especially the genes with different defense mechanisms, into adapted varieties. Here, we describe a new resistance gene obtained by mutagenesis. The mutant, MNR220 ( m utagenesis-derived n ew r esistance), enhances resistance to three rusts and powdery mildew, with the characteristics of delayed disease development at the seedling stage and completed resistance at the adult plant stage. Genetic analysis demonstrated that the resistance in MNR220 is conferred by a single semidominant gene mapped on the short arm of chromosome 2B. Gene expression profiling of several pathogenesis-related genes indicated that MNR220 has an elevated and rapid pathogen-induced response. In addition to its potential use in breeding for resistance to multiple diseases, high-resolution mapping and cloning of the disease resistance locus in MNR220 may lead to a better understanding of the regulation of defense responses in wheat.
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Details
- Title
- A mutagenesis-derived broad-spectrum disease resistance locus in wheat
- Creators
- Jackie Campbell - Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT 59717-3150 USAHongtao Zhang - Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT 59717-3150 USAMichael J Giroux - Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT 59717-3150 USALeila Feiz - Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT 59717-3150 USAYue Jin - Cereal Disease Laboratory, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), St. Paul, MN 55108 USAMeinan Wang - Department of Plant Pathology, Washington State University, Pullman, WA 99164-6430 USAXianming Chen - Wheat Genetics, Physiology, Quality, and Disease Research Unit, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Pullman, WA 99164-6430 USALi Huang - Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT 59717-3150 USA
- Publication Details
- Theoretical and applied genetics, Vol.125(2), pp.391-404
- Academic Unit
- Department of Plant Pathology
- Publisher
- Springer-Verlag; Berlin/Heidelberg
- Number of pages
- 14
- Identifiers
- 99900547379601842
- Language
- English
- Resource Type
- Journal article