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Geographic and Ecological Dimensions of Host Plant-Associated Genetic Differentiation and Speciation in the Rhagoletis cingulata (Diptera: Tephritidae) Sibling Species Group.
Doellman, Meredith M; Schuler, Hannes; Jean, Gilbert Saint; Hood, Glen R; Egan, Scott P; Powell, Thomas H Q; Glover, Mary M; Bruzzese, Daniel J; Smith, James J; Yee, Wee L; Goughnour, Robert B; Rull, Juan; Aluja, Martin; Feder, Jeffrey L.
Afiliação
  • Doellman MM; Department of Biological Sciences, Galvin Life Sciences Bldg., University of Notre Dame, Notre Dame, IN 46556, USA. mdoellma@nd.edu.
  • Schuler H; Department of Biological Sciences, Galvin Life Sciences Bldg., University of Notre Dame, Notre Dame, IN 46556, USA.
  • Jean GS; Current Address: Faculty of Science and Technology, Free University of Bozen-Bolzano, 39100 Bozen-Bolzano, Italy.
  • Hood GR; Department of Biological Sciences, Galvin Life Sciences Bldg., University of Notre Dame, Notre Dame, IN 46556, USA.
  • Egan SP; Department of Biological Sciences, Galvin Life Sciences Bldg., University of Notre Dame, Notre Dame, IN 46556, USA.
  • Powell THQ; Current Address: Department of Biological Sciences, Wayne State University, Detroit, MI 48202, USA.
  • Glover MM; Department of Biological Sciences, Galvin Life Sciences Bldg., University of Notre Dame, Notre Dame, IN 46556, USA.
  • Bruzzese DJ; Advanced Diagnostics and Therapeutics, University of Notre Dame, Notre Dame, IN 46556, USA.
  • Smith JJ; Current Address: Department of Ecology and Evolutionary Biology, Rice University, Houston, TX 77088, USA.
  • Yee WL; Department of Biological Sciences, Galvin Life Sciences Bldg., University of Notre Dame, Notre Dame, IN 46556, USA.
  • Goughnour RB; Current Address: Department of Biological Sciences, Binghamton University, Binghamton, NY 13902, USA.
  • Rull J; Department of Biological Sciences, Galvin Life Sciences Bldg., University of Notre Dame, Notre Dame, IN 46556, USA.
  • Aluja M; Department of Biological Sciences, Galvin Life Sciences Bldg., University of Notre Dame, Notre Dame, IN 46556, USA.
  • Feder JL; Michigan State University, Department of Entomology and Lyman Briggs College, East Holmes Hall, E. Lansing, MI 48824, USA.
Insects ; 10(9)2019 Aug 29.
Article em En | MEDLINE | ID: mdl-31470668
Ascertaining the causes of adaptive radiation is central to understanding how new species arise and come to vary with their resources. The ecological theory posits adaptive radiation via divergent natural selection associated with novel resource use; an alternative suggests character displacement following speciation in allopatry and then secondary contact of reproductively isolated but ecologically similar species. Discriminating between hypotheses, therefore, requires the establishment of a key role for ecological diversification in initiating speciation versus a secondary role in facilitating co-existence. Here, we characterize patterns of genetic variation and postzygotic reproductive isolation for tephritid fruit flies in the Rhagoletis cingulata sibling species group to assess the significance of ecology, geography, and non-adaptive processes for their divergence. Our results support the ecological theory: no evidence for intrinsic postzygotic reproductive isolation was found between two populations of allopatric species, while nuclear-encoded microsatellites implied strong ecologically based reproductive isolation among sympatric species infesting different host plants. Analysis of mitochondrial DNA suggested, however, that cytoplasmic-related reproductive isolation may also exist between two geographically isolated populations within R cingulata. Thus, ecology associated with sympatric host shifts and cytoplasmic effects possibly associated with an endosymbiont may be the key initial drivers of the radiation of the R. cingulata group.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Risk_factors_studies Idioma: En Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Risk_factors_studies Idioma: En Ano de publicação: 2019 Tipo de documento: Article