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Abstract
Evolutionary processes that maintain genetic diversity in plants are likely to include selection imposed by pathogens. Negative frequency-dependent selection is a mechanism for maintenance of resistance polymorphism in plant - pathogen interactions. We explored whether such selection operates in the Bromus tectorum - Ustilago bullata pathosystem. Gene-for-gene relationships between resistance and avirulence loci have been demonstrated for this pathosystem.
Keywords
balanced polymorphism,
Bromus tectorum,
cheatgrass,
frequency-dependent selection,
gene-for-gene model,
head smut disease,
Poaceae,
resistance,
Ustilaginaceae,
Ustilago bullata,
virulence
Citation
Meyer, Susan E.; Nelson, David L.; Clement, Suzette; Ramakrishnan, Alisa. 2010. Ecological genetics of the Bromus tectorum (Poaceae) - Ustilago Bullata (Ustilaginaceae): A role for frequency dependent selection? American Journal of Botany. 97(8): 1304-1312.
