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Int. J. Mol. Sci. 2017, 18(11), 2403; doi:10.3390/ijms18112403

Physical Localization of a Locus from Agropyron cristatum Conferring Resistance to Stripe Rust in Common Wheat

National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology of Sciences, Shijiazhuang 050022, China
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 26 September 2017 / Revised: 5 November 2017 / Accepted: 8 November 2017 / Published: 13 November 2017
(This article belongs to the Section Molecular Botany)
View Full-Text   |   Download PDF [4361 KB, uploaded 13 November 2017]   |  


Stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the most destructive diseases of wheat (Triticum aestivum L.) worldwide. Agropyron cristatum (L.) Gaertn. (2n = 28, PPPP), one of the wild relatives of wheat, exhibits resistance to stripe rust. In this study, wheat-A. cristatum 6P disomic addition line 4844-12 also exhibited resistance to stripe rust. To identify the stripe rust resistance locus from A. cristatum 6P, ten translocation lines, five deletion lines and the BC2F2 and BC3F2 populations of two wheat-A. cristatum 6P whole-arm translocation lines were tested with a mixture of two races of Pst in two sites during 2015–2016 and 2016–2017, being genotyped with genomic in situ hybridization (GISH) and molecular markers. The result indicated that the locus conferring stripe rust resistance was located on the terminal 20% of 6P short arm’s length. Twenty-nine 6P-specific sequence-tagged-site (STS) markers mapped on the resistance locus have been acquired, which will be helpful for the fine mapping of the stripe rust resistance locus. The stripe rust-resistant translocation lines were found to carry some favorable agronomic traits, which could facilitate their use in wheat improvement. Collectively, the stripe rust resistance locus from A. cristatum 6P could be a novel resistance source and the screened stripe rust-resistant materials will be valuable for wheat disease breeding. View Full-Text
Keywords: stripe rust; A. cristatum; common wheat; translocation lines stripe rust; A. cristatum; common wheat; translocation lines

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Zhang, Z.; Song, L.; Han, H.; Zhou, S.; Zhang, J.; Yang, X.; Li, X.; Liu, W.; Li, L. Physical Localization of a Locus from Agropyron cristatum Conferring Resistance to Stripe Rust in Common Wheat. Int. J. Mol. Sci. 2017, 18, 2403.

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