Physiologic Specialization of Puccinia triticina on Wheat in the United States in 2002

Plant Disease
J A KolmerM E Hughes

Abstract

Collections of Puccinia triticina were obtained from rust-infected wheat leaves by cooperators throughout the United States and from surveys of wheat fields and nurseries in the Great Plains, Ohio Valley, Southeast, California, and the Pacific Northwest, in order to determine the virulence of the wheat leaf rust fungus in 2002. Single uredinial isolates (785 in total) were derived from the wheat leaf rust collections and tested for virulence phenotype on lines of Thatcher wheat that are near-isogenic for leaf rust resistance genes Lr1, Lr2a, Lr2c, Lr3, Lr9, Lr16, Lr24, Lr26, Lr3ka, Lr11, Lr17, Lr30, LrB, Lr10, Lr14a, and Lr18. In the United States in 2002, 52 virulence phenotypes of P. triticina were found. Virulence phenotype MBDS, which is virulent to resistance gene Lr17, was the most common phenotype in the United States. MBDS was found in the Southeast, Great Plains, and the Ohio Valley regions, and also in California. Phenotype MCDS, virulent to Lr17 and Lr26, was the second most common phenotype and occurred in the same regions as MBDS. Virulence phenotype THBJ, which is virulent to Lr16 and Lr26, was the third most common phenotype, and was found in the southern and northern central Great Plains region. Phenotype TLGJ, ...Continue Reading

Citations

Feb 7, 2008·Proceedings. Biological Sciences·Andrew B MunkacsiGeorgiana May
Oct 9, 2013·Genome Génome / Conseil National De Recherches Canada·P D OliveraB J Steffenson
Jul 1, 2016·Plant Disease·A E DorranceV C Concibido
Feb 3, 2021·Plant Disease·Rinette LabuschagneBotma Visser
Jun 1, 2005·Current Opinion in Plant Biology·James A Kolmer

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