Mapping of SrTm4, a Recessive Stem Rust Resistance Gene from Diploid Wheat Effective to Ug99

被引：14

作者：

Briggs, Jordan ^{[1
]}

Chen, Shisheng ^{[2
,3
]}

Zhang, Wenjun ^{[2
]}

Nelson, Sarah ^{[1
]}

Dubcovsky, Jorge ^{[2
,4
]}

Rouse, Matthew N. ^{[1
,5
]}

机构：

[1] Univ Minnesota, Dept Plant Pathol, St Paul, MN 55108 USA

[2] Univ Calif Davis, Dept Plant Sci, Davis, CA 95616 USA

[3] Sichuan Agr Univ, Triticeae Res Inst, Chengdu 611130, Sichuan, Peoples R China

[4] Howard Hughes Med Inst, Chevy Chase, MD 20815 USA

[5] USDA ARS, Cereal Dis Lab, St Paul, MN 55108 USA

来源：

PHYTOPATHOLOGY | 2015年 / 105卷 / 10期

基金：

美国农业部;

关键词：

F-SP TRITICI; PUCCINIA-GRAMINIS; AEGILOPS-TAUSCHII; RACE TTKSK; MONOCOCCUM; VIRULENCE; GENOME; SR35; MAP; INTROGRESSION;

D O I：

10.1094/PHYTO-12-14-0382-R

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Race TTKSK (or Ug99) of Puccinia graminis f. sp. tritici, the causal agent of wheat stem rust, is a serious threat to wheat production worldwide. Diploid wheat, Triticum monococcum (genome A(m)), has been utilized previously for the introgression of stem rust resistance genes Sr21, Sr22, and Sr35. Multipathotype seedling tests of biparental populations demonstrated that T monococcum accession PI 306540 collected in Romania contains a recessive resistance gene effective to all P. graminis f. sp. tritici races screened, including race TTKSK. We will refer to this gene as SrTm4, which is the fourth stem rust resistance gene characterized from T. monococcum. Using two mapping populations derived from crosses of PI 272557 x PI 306540 and G3116 x P1306540, we mapped SrTm4 on chromosome arm 2A(m)L within a 2.1 cM interval flanked by sequence-tagged markers BQ461276 and DR732348, which corresponds to a 240-kb region in Brachypodium chromosome 5. The eight microsatellite and nine sequence-tagged markers linked to SrTm4 will facilitate the introgression and accelerate the deployment of SrTm4-mediated Ug99 resistance in wheat breeding programs.

引用

页码：1347 / 1354

页数：8

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