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首页> 外文期刊>Plant Disease >Physiologic specialization of Puccinia triticina on wheat in the United States in 2007.
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Physiologic specialization of Puccinia triticina on wheat in the United States in 2007.

机译：2007年美国小麦（Puccinia triticina）在小麦上的生理专化。

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In 2007, leaf rust of wheat was severe throughout the Great Plains region of North America. Yield losses in wheat due to leaf rust were estimated to be 14% in Kansas. Collections of Puccinia triticina were obtained from rust-infected leaves provided by cooperators throughout the United States and from surveys of wheat fields and nurseries in the Great Plains, Ohio River Valley, southeast, California, and Washington State in order to determine the virulence of the wheat leaf rust population in 2007. Single uredinial isolates (868 in total) were derived from the collections and tested for virulence phenotype on lines of Thatcher wheat that are near-isogenic for leaf rust resistance genes Lr1, Lr2a, Lr2c, Lr3a, Lr9, Lr16, Lr24, Lr26, Lr3ka, Lr11, Lr17a, Lr30, LrB, Lr10, Lr14a, Lr18, Lr21, and Lr28, and on winter wheat lines with genes Lr41 and Lr42. Fifty-two virulence phenotypes were found. Virulence phenotypes TDBJG, MFPSC, and TDBJH were among the four most common phenotypes and were all virulent to resistance gene Lr24. These phenotypes were found throughout the Great Plains region. Phenotype MLDSD, with virulence to Lr9, Lr17, and Lr41, was also widely distributed in the Great Plains. In the soft red winter wheat region of the southeastern states, phenotypes TCRKG, with virulence to genes Lr11, Lr26, and Lr18, and MFGJH, with virulence to Lr24, Lr26, and Lr11, were among the common phenotypes. Virulence phenotypes with virulence to Lr16 were most frequent in the spring wheat region of the northern Great Plains. Virulence phenotypes with virulence to Lr11, Lr18, and Lr26 were most common in the soft red winter areas of the southeastern states and Ohio Valley. Virulence to Lr21 was not found in any of the tested isolates.
机译：2007年，整个北美大平原地区的小麦叶锈病严重。据估计，在堪萨斯州，由于叶锈病，小麦的产量损失为14％。 Puccinia triticina 的集合是从全美国的合作者提供的锈蚀叶子以及大平原，俄亥俄州河谷，东南部，加利福尼亚和华盛顿州麦田和苗圃的调查中获得的。为了确定2007年小麦叶锈病种群的毒力。从收集物中分离出单一尿素分离株（共868个），并在撒切尔小麦品系上测试了毒力表型，这些菌株对叶锈病抗性基因具有近等基因性 Lr1 ， Lr2a ， Lr2c ， Lr3a ， Lr9 ， Lr16 ， Lr24 ， Lr26 ， Lr3ka ， Lr11 ， Lr17a ， Lr30 ， LrB ， Lr10 ， Lr14a ， Lr18 ， Lr21 ，和 Lr28 ，以及具有 Lr41 和 Lr42 基因的冬小麦品系。发现了52种毒力表型。毒力表型TDBJG，MFPSC和TDBJH是最常见的四种表型，均对耐药基因 Lr24 具有毒性。在整个大平原地区都发现了这些表型。表型MLDSD也具有对 Lr9 ， Lr17 和 Lr41 的毒力，也广泛分布在大平原。在东南州的柔红冬小麦地区，表型TCRKG具有对 Lr11 ， Lr26 和 Lr18 和MFGJH基因的毒力，对 Lr24 ， Lr26 和 Lr11 具有毒性的是常见的表型。在大平原北部的春小麦地区，对 Lr16 具有毒力的毒力表型最为常见。在东南州和俄亥俄河谷的柔和红色冬季地区，对 Lr11 ， Lr18 和 Lr26 具有毒力的毒力表型最为常见。在所有测试菌株中均未发现对 Lr21 的致病性。

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