Journal
SCIENCE
Volume 341, Issue 6147, Pages 786-788Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1239028
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Funding
- Borlaug Global Rust Initiative (BGRI) Durable Rust Resistance in Wheat (DRRW) Project
- Bill & Melinda Gates Foundation
- UK Department for International Development
- Office of the Chief Executive (OCE) Post Doctoral Fellowship of CSIRO, Australia
- Grains Research and Development Corporation, Australia
- Endeavor International Postgraduate Research Scholarship of Department of Education, Science and Training (DEST) and Sydney University, Australia
- Australian Centre for International Agricultural Research project [CIM2007/084]
- Basic Research to Enable Agricultural Development Program of the National Science Foundation (NSF) of the United States [IOS-0965429]
- NSF Plant Genome Research Program [DBI-0701916]
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [0965429] Funding Source: National Science Foundation
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Wheat stem rust, caused by the fungus Puccinia graminis f. sp. tritici, afflicts bread wheat (Triticum aestivum). New virulent races collectively referred to as Ug99 have emerged, which threaten global wheat production. The wheat gene Sr33, introgressed from the wild relative Aegilops tauschii into bread wheat, confers resistance to diverse stem rust races, including the Ug99 race group. We cloned Sr33, which encodes a coiled-coil, nucleotide-binding, leucine-rich repeat protein. Sr33 is orthologous to the barley (Hordeum vulgare) Mla mildew resistance genes that confer resistance to Blumeria graminis f. sp. hordei. The wheat Sr33 gene functions independently of RAR1, SGT1, and HSP90 chaperones. Haplotype analysis from diverse collections of Ae. tauschii placed the origin of Sr33 resistance near the southern coast of the Caspian Sea.
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