Mapping of a resistance gene to loose smut (Ustilago tritici) from the Canadian wheat breeding line BW278

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• 作者：Mulualem T. Kassa ; Jim G. Menzies ; Curt A. McCartney
• 关键词：UtBW278 ; Loose smut ; Ustilago tritici ; Wheat ; Triticum aestivum
• 刊名：Molecular Breeding
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：35
• 期：9
• 全文大小：645 KB
• 参考文献：Bailey KL, Gossen BD, Gugel RK, Morrall RAA (2003) Diseases of field crops in Canada, 3rd edn. University Extension Press, University of Saskatchewan, Saskatoon
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• 作者单位：Mulualem T. Kassa (1)
  Jim G. Menzies (1)
  Curt A. McCartney (1)
  
  1. Cereal Research Centre, Agriculture and Agri-Food Canada, 101 Route 100, Morden, MB, R6M 1Y5, Canada
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Sciences
  
• 出版者：Springer Netherlands
• ISSN：1572-9788

文摘

Loose smut is a common disease of wheat caused by the fungus Ustilago tritici (Pers.) Rostr. Production of resistant cultivars is an effective strategy for managing this disease. Relatively few loose smut resistance genes have been identified in bread and durum wheat. The genetic basis of resistance to U. tritici in the Canadian wheat breeding line BW278 was studied in a recombinant inbred line (RIL) population of 94 individuals developed from the bread wheat cross BW278/‘AC Foremost- BW278 showed complete resistance to U. tritici race T9, whereas ‘AC Foremost-was susceptible. Phenotypic assessment of the RILs indicated that a single gene, temporarily designated as UtBW278, segregated for loose smut resistance. Markers linked to UtBW278 were identified by bulked segregant analysis. Linkage analysis revealed that UtBW278 was located on the short arm of chromosome 5B and identified four single-nucleotide polymorphism (SNP) loci that co-segregated with UtBW278. Interestingly, UtBW278 mapped closely to a sequence characterized amplified region marker that was previously linked to the loose smut resistance gene Utd1 from durum wheat. Haplotype analysis of a panel of wheat lines was conducted to identify wheat lines that could carry UtBW278. SNP markers were identified for marker-assisted selection of UtBW278. Keywords UtBW278 Loose smut Ustilago tritici Wheat Triticum aestivum