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首页> 外文期刊>Plant Disease >Race Characterization of Puccinia striiformis f. sp tritici, the Cause of Wheat Stripe Rust, in Saskatchewan and Southern Alberta, Canada and Virulence Comparison with Races from the United States
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Race Characterization of Puccinia striiformis f. sp tritici, the Cause of Wheat Stripe Rust, in Saskatchewan and Southern Alberta, Canada and Virulence Comparison with Races from the United States

机译：小麦条锈菌的种族特征f。加拿大萨斯喀彻温省和艾伯塔省南部的小麦条纹锈病的致病菌sp tritici以及美国种族的毒力比较

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Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici, has been common across Saskatchewan, Canada since 2000. Fifty-nine isolates of P. striifonnis f. sp. tritici, the majority of which were collected between 2011 and 2013 from Saskatchewan and southern Alberta, were analyzed for virulence frequency and diversity and compared with isolates characterized in the Pacific Northwest and Great Plains regions of the United States. In all, 31 wheat differentials, including 20 near-isogenic lines and 1 triticale variety, differentiated 59 P. striifonnis f. sp. tritici isolates into 33 races, of which one race, C-PST-1, represented 31% of the. isolates. None of the races were virulent on Yr5, Yr15, or YrSP. Virulence frequency ranged from 65 to 98% on YrA, Yr2, Yr8, Yr9, Yr27, Yr29, Yr32, YrSu, 'Heines VII', and 'Nord Deprez'. Race C-PST-6 was virulent on the greatest number of the differentials (n = 25) and C-PST-18 on the fewest (n = 14). Discriminant analysis of principal components and multivariate cluster analyses detected three and four major groups, respectively, which differed from each other in terms of virulence spectrum and year of collection. The diversity of the P. striiformis f. sp. tritici population in southern Alberta was greater than in Saskatchewan, which indicated that, although P. striifonnis f. sp. tritici is primarily windborne over great distances and does not usually overwinter, there are detectable differences in virulence between these regions of western Canada. Comparative analyses of virulence frequency of Saskatchewan or southern Alberta isolates with isolates representing races from the Great Plains and the Pacific Northwest of the United States indicated greater similarity of Saskatchewan races to the Great Plains despite strong correlations with both parts of the United States. This suggests that the P. striiformis f. sp. tritici population in Saskatchewan is a mixture of inoculum from both parts of the United States.
机译：小麦条锈菌引起的小麦条锈病f。 sp。自2000年以来，Tritici在加拿大萨斯喀彻温省已很普遍。五十九种P. striifonnis f。分离株。 sp。 Tritici（大多数是2011年至2013年间从萨斯喀彻温省和艾伯塔省南部收集的）进行了毒力频率和多样性分析，并与美国西北太平洋地区和美国大平原地区的分离株进行了比较。总共有31个小麦差异，包括20个近等基因系和1个小黑麦变种，使59 P. striifonnis f。分化。 sp。小麦分离为33个种族，其中一个种族C-PST-1占该种族的31％。隔离株。所有种族在Yr5，Yr15或YrSP上都没有毒性。 YrA，Yr2，Yr8，Yr9，Yr27，Yr29，Yr32，YrSu，'Heines VII'和'Nord Deprez'的毒力频率范围为65％至98％。种族C-PST-6在最大数量的差异（n = 25）上具有致命性，而C-PST-18在最小差异（n = 14）上具有致命性。主成分判别分析和多变量聚类分析分别检测到三个和四个主要组，它们在毒力谱和收集年份方面互不相同。条纹假单胞菌的多样性f。 sp。阿尔伯塔省南部的小麦种群大于萨斯喀彻温省，这表明尽管P. striifonnis f。 sp。小麦主要在远距离传播，通常不越冬，加拿大西部这些地区之间的毒力可检测到差异。对萨斯喀彻温省或艾伯塔省南部分离株与代表美国大平原和西北太平洋种族的分离株的毒力频率进行比较分析表明，尽管萨斯喀彻温省种族与美国两个州之间有很强的相关性，但它们与大平原的相似性更高。这表明，P。striiformis f.。 sp。萨斯喀彻温省的小麦种群是美国两个地区的接种物混合物。

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