Identification of root bacteria associated with different stripe rust resistance in wheat

AbstractKey messageThe stripe rust resistance geneYr34 was transferred to polyploid wheat chromosome 5AL from T. monococcumand has been used for over two centuries.Wheat stripe (or yellow) rust, caused by Puccinia striiformis f. sp. tritici (Pst), is currently among the most damaging fungal diseases of wheat worldwide. In this study, we report that the stripe rust resistance gene Yr34 (synonym Yr48) is located within a distal segment of the cultivated Triticum monococcum subsp. monococcum chromosome 5AmL translocated to chromosome 5AL in polyploid wheat. The diploid wheat species Triticum monococcum (genome AmAm) is closely related to T. urartu (donor of the A genome to polyploid wheat) and has good levels of resistance against the stripe rust pathogen. When present in hexaploid wheat, the T. monococcum Yr34 resistance gene confers a moderate level of resistance against virulent Pst races present in California and the virulent Chinese race CYR34. In a survey of 1,442 common wheat genotypes, we identified 5AmL translocations of fourteen different lengths in 17.5% of the accessions, with higher frequencies in Europe than in other continents. The old European wheat variety “Mediterranean” was identified as a putative source of this translocation, suggesting that Yr34 has been used for over 200 years. Finally, we designed diagnostic CAPS and sequenced-based markers that will be useful to accelerate the deployment of Yr34 in wheat breeding programs to improve resistance to this devastating pathogen.

Download Full-text

Identification of molecular markers linked to the Yr15 stripe rust resistance gene of wheat originated in wild emmer wheat, Triticum dicoccoides

Theoretical and Applied Genetics ◽

10.1007/s001220050604 ◽

1997 ◽

Vol 95 (4) ◽

pp. 622-628 ◽

Cited By ~ 83

Author(s):

G. L. Sun ◽

T. Fahima ◽

A. B. Korol ◽

T. Turpeinen ◽

A. Grama ◽

...

Keyword(s):

Molecular Markers ◽

Resistance Gene ◽

Stripe Rust ◽

Rust Resistance ◽

Triticum Dicoccoides ◽

Wild Emmer Wheat ◽

Wild Emmer ◽

Rust Resistance Gene ◽

Stripe Rust Resistance ◽

Stripe Rust Resistance Gene

Download Full-text

Genetics of adult plant stripe rust resistance in CSP44, a selection from Australian wheat

Journal of Genetics ◽

10.1007/bf02715806 ◽

2005 ◽

Vol 84 (3) ◽

pp. 337-340 ◽

Cited By ~ 5

Author(s):

Renu Khanna ◽

U. K. Bansal ◽

R. G. Saini

Keyword(s):

Stripe Rust ◽

Rust Resistance ◽

Stripe Rust Resistance ◽

Adult Plant ◽

Australian Wheat

Download Full-text

A Novel Wheat-Dasypyrum breviaristatum Substitution Line with Stripe Rust Resistance

Cytogenetic and Genome Research ◽

10.1159/000366051 ◽

2014 ◽

Vol 143 (4) ◽

pp. 280-287 ◽

Cited By ~ 10

Author(s):

Guang-Rong Li ◽

Jin-Mei Zhao ◽

Dong-Hai Li ◽

En-Nian Yang ◽

Yu-Feng Huang ◽

...

Keyword(s):

Stripe Rust ◽

Rust Resistance ◽

Substitution Line ◽

Stripe Rust Resistance ◽

Dasypyrum Breviaristatum

Download Full-text

Allelic analysis of stripe rust resistance genes on wheat chromosome 2BS

Genome ◽

10.1139/g08-079 ◽

2008 ◽

Vol 51 (11) ◽

pp. 922-927 ◽

Cited By ~ 35

Author(s):

P. G. Luo ◽

X. Y. Hu ◽

Z. L. Ren ◽

H. Y. Zhang ◽

K. Shu ◽

...

Keyword(s):

Ssr Markers ◽

Stripe Rust ◽

Resistance Genes ◽

Rust Resistance ◽

Dominant Gene ◽

Wheat Chromosome ◽

Stripe Rust Resistance ◽

Resistance Response ◽

Rust Resistance Genes ◽

Yr Genes

Stripe rust, caused by Puccinia striiormis Westend f. sp. tritici, is one of the most important foliar diseases of wheat ( Triticum aestivum L.) worldwide. Stripe rust resistance genes Yr27, Yr31, YrSp, YrV23, and YrCN19 on chromosome 2BS confer resistance to some or all Chinese P. striiormis f. sp. tritici races CYR31, CYR32, SY11-4, and SY11-14 in the greenhouse. To screen microsatellite (SSR) markers linked with YrCN19, F1, F2, and F3 populations derived from cross Ch377/CN19 were screened with race CYR32 and 35 SSR primer pairs. Linkage analysis indicated that the single dominant gene YrCN19 in cultivar CN19 was linked with SSR markers Xgwm410, Xgwm374, Xwmc477, and Xgwm382 on chromosome 2BS with genetic distances of 0.3, 7.9, 12.3, and 21.2 cM, respectively. Crosses of CN19 with wheat lines carrying other genes on chromosome 2B showed that all were located at different loci. YrCN19 is thus different from the other reported Yr genes in chromosomal location and resistance response and was therefore named Yr41. Prospects and strategies of using Yr41 and other Yr genes in wheat improvement for stripe rust resistance are discussed.

Download Full-text