Remnant populations of the regal fritillary (Speyeria idalia) in Pennsylvania: Local genetic structure in a high gene flow species |
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Authors: | Nusha Keyghobadi Katherine P Unger Jason D Weintraub Dina M Fonseca |
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Institution: | (1) Department of Entomology, Academy of Natural Sciences, 1900 Benjamin Franklin Parkway, Philadelphia, PA 19103, USA;(2) University of British Columbia Okanagan, 3333 University Way, Kelowna, BC, Canada , V1V 1V7;(3) Molecular Ecology, Patrick Center for Environmental Research, Academy of Natural Sciences, 1900 Benjamin Franklin Parkway, Philadelphia, PA 19103, USA |
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Abstract: | The Regal Fritillary butterfly, Speyeria idalia (Drury) (Lepidoptera: Nymphalidae), has been described as a high gene flow species. Supporting this assertion, previous studies in the Great Plains, where it is still relatively widespread, have found evidence of gene flow across hundreds of kilometers. Using mitochondrial and microsatellite loci, we examined the spatial genetic structure of a very isolated Pennsylvania population of these butterflies that occupies three separate meadows located within ten kilometers of each other. We found restricted gene flow and a distinct structure, with each meadow having a unique genetic signature. Our findings indicate that even a species that normally exhibits high gene flow may show fine-scale genetic subdivision in areas where populations have been largely extirpated.Authors contributed equally. |
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Keywords: | butterflies isolation microsatellites mitochondrial DNA population genetics |
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