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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zurn, Jason D. Newcomb, Maria Rouse, Matthew N. Jin, Yue Chao, Shiaoman Sthapit, Jinita See, Deven R. Wanyera, Ruth Njau, Peter Bonman, J. Michael Brueggeman, Robert Acevedo, Maricelis |
| Copyright Year | 2014 |
| Abstract | Managing wheat stem rust, caused by Puccinia graminis f. sp. tritici (Pgt), is imperative for the preservation of global food security. The most effective strategy is pyramiding several resistance genes into adapted wheat cultivars. A search for new resistance sources to Pgt race TTKSK resistance identified a spring wheat landrace, accession PI 626573, as a potentially novel source of resistance. A cross was made between LMPG-6, a susceptible spring wheat line, and PI 626573 and used to develop a recombinant inbred population to map the resistance. Bulk segregant analysis (BSA) of LMPG-6/PI 626573 F$_{2}$ progeny determined resistance was conferred by a single dominant gene given the provisional designation SrWLR. The BSA identified nine microsatellite (SSR) markers on the long arm of chromosome 2B associated with the resistant phenotype. Fifteen polymorphic SSRs, including the nine identified in the BSA, were used to produce a linkage map of chromosome 2B, positioning SrWLR in an 8.8 cM region between the SSRs GWM47 and WMC332. This region has been reported to contain the wheat stem rust resistance genes Sr9 and SrWeb, the latter conferring resistance to Pgt race TTKSK. The 9,000 marker Illumina Infinium iSelect SNP assay was used to further saturate the SrWLR region. The cosegregating SNP markers IWA6121, IWA6122, IWA7620, IWA8295, and IWA8362 further delimited the SrWLR region distally to a 1.9 cM region. The present study demonstrates the iSelect assay to be an efficient tool to delimit the region of a mapping population and establish syntenic relationships between closely related species. |
| Starting Page | 871 |
| Ending Page | 881 |
| Page Count | 11 |
| File Format | |
| ISSN | 13803743 |
| Journal | Molecular Breeding |
| Volume Number | 34 |
| Issue Number | 3 |
| e-ISSN | 15729788 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2014-04-03 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Wheat Stem rust SrWLR iSelect Infinium SNP Plant Sciences Plant Genetics & Genomics Plant Pathology Plant Physiology Biotechnology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Plant Science Molecular Biology Biotechnology Agronomy and Crop Science |
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