Virulence of Puccinia triticina on Wheat in the United States from 1996 to 1998

Autor:	M. E. Hughes, D. L. Long, K. J. Leonard
Rok vydání:	2000
Předmět:	Puccinia triticina biology Ecology Host (biology) food and beverages Virulence Plant Science biology.organism_classification Wheat leaf rust Race (biology) Poaceae Puccinia recondita Agronomy and Crop Science Overwintering
Zdroj:	Plant Disease. 84:1334-1341
ISSN:	1943-7692 0191-2917
Popis:	Isolates of Puccinia triticina were obtained from wheat leaf collections made by cooperators throughout the United States and from surveys of wheat fields and nurseries in the Great Plains, Ohio Valley, and Gulf Coast states in 1996, 1997, and 1998. Virulence-avirulence phenotypes were determined on 14 host lines that are near-isogenic for leaf rust resistance. We found 31 phenotypes among 277 single uredinial isolates in 1996, 56 phenotypes among 989 isolates in 1997, and 43 phenotypes among 989 isolates in 1998. As in previous surveys, regional race distribution patterns showed that the central United States is a single epidemiological unit distinct from the eastern United States. The distinctive racial composition of collections from the southeast, northeast, and Ohio Valley indicate that populations of P. triticina in those areas are not closely connected, suggesting that epidemics originate from localized overwintering sources.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14ee28ff174dc676350f824fa6947262 https://doi.org/10.1094/pdis.2000.84.12.1334 Zobrazit plný text záznamu