Physiologic Specialization of Puccinia triticina on Wheat in the United States in 2011

Collections of Puccinia triticina were obtained from rust-infected leaves provided by cooperators throughout the United States and from wheat fields and breeding plots by USDA-ARS personnel and cooperators in the Great Plains, Ohio River Valley, southeastern states, Oregon, and Washington State in o...

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Veröffentlicht in:Plant disease. - 1997. - 97(2013), 8 vom: 05. Aug., Seite 1103-1108
1. Verfasser: Kolmer, J A (VerfasserIn)
Weitere Verfasser: Hughes, M E
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article
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520 |a Collections of Puccinia triticina were obtained from rust-infected leaves provided by cooperators throughout the United States and from wheat fields and breeding plots by USDA-ARS personnel and cooperators in the Great Plains, Ohio River Valley, southeastern states, Oregon, and Washington State in order to determine the virulence of the wheat leaf rust population in 2011. Single uredinial isolates (440 total) were derived from the collections and tested for virulence phenotype on 18 lines of Thatcher wheat and a winter wheat line that are near-isogenic for 19 leaf rust resistance genes. In 2011, 87 virulence phenotypes were described in the United States. Virulence phenotypes TBBGJ, MLDSD, and TCRKG were the three most common phenotypes. Phenotype TBBGJ is virulent to Lr39/41 and was widely distributed throughout the hard red winter wheat region of the Great Plains. Phenotype MLDSD is virulent to Lr17 and Lr39/41 and was widely distributed throughout the United States. Phenotype TCRKG is virulent to Lr11, Lr18, and Lr26 and was found mostly in the soft red winter wheat region in the eastern United States. Isolates with virulence to Lr39/41 and avirulence to Lr9 were prevalent in the Great Plains region for the first time. Virulence to Lr21 was present in five virulence phenotypes mostly from the spring wheat region of the northern Great Plains 
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