Identification and location of Stb9, a gene for resistance to septoria tritici blotch in wheat cultivars Courtot and Tonic
Identification and location of Stb9, a gene for resistance to septoria tritici blotch in wheat cultivars Courtot and Tonic
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DOI：
10.1111/j.1365-3059.2008.02013.x
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发表时间：
2009-06-01
期刊：
影响因子：
2.7
通讯作者：
Brown, J. K. M.
中科院分区：
文献类型：
--
作者：
Chartrain, L.;Sourdille, P.;Brown, J. K. M.
本研究报道了在两个春小麦品种Courtot和Tonic中发现了一个抗小麦褐斑病（STB）基因。该基因被命名为Stb9，赋予了对小麦分枝杆菌分离物IPO89011的抗性。利用Courtot x Chinese Spring现有图谱进行QTL定位，定位于2B染色体长臂标记Xfbb226 （3.6 cM）和XksuF1b （9 cM）之间。结果表明，与Stb9相关的标记与Tonic x Longbow f3家族对IPO89011的抗性有关。Tonic与Courtot杂交的等位基因测试证实，Tonic在Stb9位点或非常接近Stb9位点有一个抗IPO89011的基因。Stb9侧翼的SSR标记可用于标记辅助选择，将该基因渗入到冬季品种或欧洲以外的春小麦育种计划中。
This study reports the discovery of a gene for resistance to septoria tritici blotch (STB) in two spring wheat cultivars, Courtot and Tonic. The gene, named Stb9, confers resistance to Mycosphaerella graminicola isolate IPO89011. It was mapped by quantitative trait loci (QTL) analysis using an existing map of Courtot x Chinese Spring and was located between markers Xfbb226 (3.6 cM) and XksuF1b (9 cM) on the long arm of chromosome 2B. Markers linked to Stb9 in Courtot were then shown to be linked to resistance to IPO89011 in F 3 families of Tonic x Longbow. Allelism tests in which Tonic was crossed with Courtot confirmed that Tonic has a gene for resistance to IPO89011 at or very close to the Stb9 locus. SSR markers flanking Stb9 may be used in marker-assisted selection to introgress this gene into winter cultivars or in spring wheat breeding programmes outside Europe.