Distribution of virulence in two populations of Puccinia coronata f.sp. avenae in Canada

J. A. Kolmer, J. Chong

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12 Scopus citations

Abstract

The distributions of virulence in the eastern (Ontario and Quebec) and prairie (Manitoba and Saskatchewan) populations of oat crown rust fungus Puccinia coronata f.sp. avenae were examined from virulence survey data in 1974 and 1990 to determine if these populations resemble previously characterized sexual or asexual cereal rust populations. Single uredinial isolates from both populations were evaluated for virulence phenotype on single gene differential host lines. Relatively few pairs of virulences in both populations were found to be nonrandomly associated. No associations between pairs of virulences persisted for >3 yr in either population. Sexual recombination most likely functions in evenly distributing virulences among phenotypes in both populations. -from Authors

Original languageEnglish (US)
Pages (from-to)946-950
Number of pages5
JournalCanadian Journal of Botany
Volume71
Issue number7
DOIs
StatePublished - Jan 1 1993

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