The Gene Sr33, an Ortholog of Barley Mla Genes, Encodes Resistance to Wheat Stem Rust Race Ug99

Author:

Periyannan Sambasivam1,Moore John1,Ayliffe Michael1,Bansal Urmil2,Wang Xiaojing34,Huang Li3,Deal Karin5,Luo Mingcheng5,Kong Xiuying6,Bariana Harbans2,Mago Rohit1,McIntosh Robert2,Dodds Peter1,Dvorak Jan5,Lagudah Evans1

Affiliation:

1. Commonwealth Scientific and Industrial Research Organization (CSIRO) Plant Industry, General Post Office Box 1600, Canberra, ACT 2601, Australia.

2. The University of Sydney Plant Breeding Institute–Cobbitty, PB4011, Narellan, NSW 2567, Australia.

3. Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT 59717, USA.

4. State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest Agriculture and Forestry University, Yangling, Shaanxi 712100, China.

5. Department of Plant Sciences, University of California, Davis, CA 95616, USA.

6. Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China.

Abstract

Resistance May Not Be Futile Recently, Ug99, a particularly devastating strain of wheat stem rust fungus, has emerged, which could potentially threaten food security. Now, two genes have been cloned that offer resistance to Ug99. Saintenac et al. (p. 783 , published online 27 June) cloned Sr35 from Triticum monococcum , a diploid wheat species not often cultivated. Periyannan et al. (p. 786 , published online 27 June) cloned Sr33 from Aegilops tauschii , a diploid wild grass that contributed to the hexaploid genome of cultivated wheat. The genes both encode proteins that show features typical of other disease resistance proteins and offer opportunities to slow the pace of Ug99 progression.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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