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Detecting migration using multilocus genotypes and its effects on gene flow in populations of Rhizoctonia solani Kuhn AG-3 from potato in North Carolina


, : Detecting migration using multilocus genotypes and its effects on gene flow in populations of Rhizoctonia solani Kuhn AG-3 from potato in North Carolina. Phytopathology 91(6 Supplement): S105, June

This study describes the application of a population genetics-based statistical method for detecting migration (Rannala B., and Mountain, J. L. 1997. Proc. Natl. Acad. Sci. USA 94:9197-9201) in populations of the plant pathogenic fungus Rhizoctonia solani anastomosis group 3 (AG-3) using polymerase chain reaction multilocus restriction fragment length polymorphisms (PCR-RFLPs) genotypes. The effect of migration from source populations of the pathogen on potato seed tubers on a recipient (soil population) in North Carolina was examined. Analysis of genetic data indicated that the North Carolina population of R. solani AG-3 has experienced recent migration. Unidirectional migration from source population(s) followed by establishment of migrant genotypes in the recipient population is postulated to explain the high level of gene flow observed.

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