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Speciation and introgression between Mimulus nasutus and Mimulus guttatus.
Brandvain, Yaniv; Kenney, Amanda M; Flagel, Lex; Coop, Graham; Sweigart, Andrea L.
Afiliación
  • Brandvain Y; Department of Evolution and Ecology & Center for Population Biology, University of California - Davis, Davis, California, United States of America; Department of Plant Biology, University of Minnesota - Twin Cities. St. Paul, Minnesota, United States of America.
  • Kenney AM; Department of Genetics, University of Georgia, Athens, Georgia, United States of America.
  • Flagel L; Monsanto Company, Chesterfield, Missouri, United States of America.
  • Coop G; Department of Evolution and Ecology & Center for Population Biology, University of California - Davis, Davis, California, United States of America.
  • Sweigart AL; Department of Genetics, University of Georgia, Athens, Georgia, United States of America.
PLoS Genet ; 10(6): e1004410, 2014 Jun.
Article en En | MEDLINE | ID: mdl-24967630
Mimulus guttatus and M. nasutus are an evolutionary and ecological model sister species pair differentiated by ecology, mating system, and partial reproductive isolation. Despite extensive research on this system, the history of divergence and differentiation in this sister pair is unclear. We present and analyze a population genomic data set which shows that M. nasutus budded from a central Californian M. guttatus population within the last 200 to 500 thousand years. In this time, the M. nasutus genome has accrued genomic signatures of the transition to predominant selfing, including an elevated proportion of nonsynonymous variants, an accumulation of premature stop codons, and extended levels of linkage disequilibrium. Despite clear biological differentiation, we document genomic signatures of ongoing, bidirectional introgression. We observe a negative relationship between the recombination rate and divergence between M. nasutus and sympatric M. guttatus samples, suggesting that selection acts against M. nasutus ancestry in M. guttatus.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Genoma de Planta / Mimulus / Especiación Genética / Aislamiento Reproductivo Tipo de estudio: Prognostic_studies Idioma: En Revista: PLoS Genet Asunto de la revista: GENETICA Año: 2014 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Genoma de Planta / Mimulus / Especiación Genética / Aislamiento Reproductivo Tipo de estudio: Prognostic_studies Idioma: En Revista: PLoS Genet Asunto de la revista: GENETICA Año: 2014 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos