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Physiologic specialization of Puccinia triticina, the causal agent of wheat leaf rust, in Canada in 2013
Canadian Journal of Plant Pathology ( IF 2 ) Pub Date : 2019-08-29 , DOI: 10.1080/07060661.2019.1653376
Brent D. Mccallum 1 , Pat Seto-Goh 1 , Elsa Reimer 1 , Adam Foster 2 , Allen Xue 3
Affiliation  

Abstract Wheat leaves infected with leaf rust collected across Canada in 2013 were used to isolate 265 Puccinia triticina Eriks. single uredinial isolates. When these were analysed for virulence on 16 standard differential wheat lines 38 virulence phenotypes were found, with MBDS (11.7%), TBBG (11.3%), TNBG (10.2%) and MBTN (8.3%) the most common. In Manitoba and Saskatchewan, 29 virulence phenotypes were found among 236 isolates, with MBDS (13.1%), TBBG (12.7%) and TNBG (11.4%) being the most common. From Ontario, four virulence phenotypes MBTN (73.7%), LCDN (10.5%), MGPS (10.5%) and TCRJ (5.3%) were determined among 19 isolates. There were 10 isolates from Prince Edward Island which grouped into seven different virulence phenotypes, the most common being MBNQ (three isolates) and MCNQ (two isolates). The frequencies of virulence to Lr9, Lr26, Lr3ka, Lr17, Lr30, Lr14a and Lr21 increased, and virulence to Lr2a, Lr2c, Lr16, Lr24, Lr11, Lr10 and Lr18 decreased, when compared with 2012. The increase in virulence frequency to Lr21 is important since many Canadian wheat cultivars have this gene, and could become more susceptible. There were no virulence phenotypes in common between Ontario and Prince Edward Island, and only one virulence phenotype from each of these regions was found in the larger sample from Manitoba and Saskatchewan, demonstrating the differences in the populations across Canada.

中文翻译:

2013年加拿大小麦叶锈病病原体小麦叶锈病的生理特化

摘要 2013 年在加拿大采集的感染叶锈病的小麦叶片被用来分离 265 株 Puccinia triticina Eriks。单尿尿分离株。当对 16 个标准差异小麦品系的毒力进行分析时,发现了 38 个毒力表型,其中 MBDS (11.7%)、TBBG (11.3%)、TNBG (10.2%) 和 MBTN (8.3%) 最常见。在曼尼托巴省和萨斯喀彻温省,在 236 株分离株中发现了 29 种毒力表型,其中 MBDS (13.1%)、TBBG (12.7%) 和 TNBG (11.4%) 最为常见。在安大略省,在 19 个分离株中确定了四种毒力表型 MBTN (73.7%)、LCDN (10.5%)、MGPS (10.5%) 和 TCRJ (5.3%)。爱德华王子岛有 10 株分离株,分为七种不同的毒力表型,最常见的是 MBNQ(三株)和 MCNQ(两株)。对 Lr9、Lr26、与 2012 年相比,Lr3ka、Lr17、Lr30、Lr14a 和 Lr21 增加,对 Lr2a、Lr2c、Lr16、Lr24、Lr11、Lr10 和 Lr18 的毒力下降。 Lr21 的毒力频率增加很重要,因为许多加拿大小麦品种基因,并且可能变得更易感。安大略省和爱德华王子岛省之间没有共同的毒力表型,并且在来自曼尼托巴省和萨斯喀彻温省的较大样本中只发现了来自这些地区中的每一个的毒力表型,这表明加拿大各地的人群存在差异。
更新日期:2019-08-29
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