Kolmer J A, Long D L, Hughes M E
United States Department of Agriculture-Agricultural Research Service Cereal Disease Laboratory, Department of Plant Pathology, University of Minnesota, St. Paul 55108.
Plant Dis. 2008 Aug;92(8):1241-1246. doi: 10.1094/PDIS-92-8-1241.
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 2006. Single uredinial isolates (718 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, Lr2, and Lr28 and winter wheat lines with genes Lr41 and Lr42. In the United States in 2006, 56 virulence phenotypes were found. Virulence phenotypes TDBJG, TDBGG, 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 and MBRKG with virulence to genes Lr11, Lr26, and Lr18 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 to Lr21 was not found in any of the tested isolates.
从小麦叶锈病菌感染的叶片中采集了小麦条锈菌样本，这些叶片由美国各地的合作伙伴提供，同时还在大平原、俄亥俄河谷、东南部、加利福尼亚州和华盛顿州的麦田和苗圃进行了调查，目的是确定2006年小麦叶锈菌群体的毒力。从这些样本中分离出单个夏孢子堆分离株（共718个），并在与叶锈病抗性基因Lr1、Lr2a、Lr2c、Lr3a、Lr9、Lr16、Lr24、Lr26、Lr3ka、Lr11、Lr17a、Lr30、LrB、Lr10、Lr14a、Lr18、Lr2和Lr28近等基因的Thatcher小麦品系以及带有基因Lr41和Lr42的冬小麦品系上测试其毒力表型。2006年在美国发现了56种毒力表型。毒力表型TDBJG、TDBGG和TDBJH是四种最常见的表型之一，并且对抗性基因Lr24均有毒力。这些表型在大平原地区均有发现。对Lr9、Lr17和Lr41有毒力的表型MLDSD也广泛分布于大平原地区。在东南部各州的软红冬小麦区，对基因Lr11、Lr26和Lr18有毒力的表型TCRKG和MBRKG是常见表型。对Lr16有毒力的毒力表型在大平原北部的春小麦区最为常见。在所测试的分离株中未发现对Lr21有毒力的情况。
