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Virulence combinations in sexually and asexually reproducing populations of Puccinia graminis avenae in Canada

, : Virulence combinations in sexually and asexually reproducing populations of Puccinia graminis avenae in Canada. Canadian Journal of Plant Pathology 7(2): 127-131

Virulence variability was studied in a sexually reproducing population of P. graminis avenae in eastern Ontario over a 3-yr period and compared with an asexual population in Manitoba. Twelve virulence combinations were identified in collections from the sexual population vs. 11 from the comparable asexual population. Avirulence on resistance conferred by genes Pg-8, Pg-13, Pg-16 and Pg-a characterized the Ontario population while avirulence on resistance conferred by genes Pg-9, Pg-13, Pg-15, Pg-16 and Pg-a predominated in the Manitoba population. The races in the sexual population were more widely virulent (5.5 loci vs. 4.0 loci), on the average, than those of the asexual population.

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Accession: 001507706

DOI: 10.1080/07060668509501487

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