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Genomic variation in cline shape across a hybrid zone

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dc.contributor.author Kingston, Sarah E. en
dc.contributor.author Jernigan, Robert W. en
dc.contributor.author Fagan, William F. en
dc.contributor.author Braun, David R. en
dc.contributor.author Braun, Michael J. en
dc.date.accessioned 2013-09-23T12:51:53Z
dc.date.available 2013-09-23T12:51:53Z
dc.date.issued 2012
dc.identifier.citation Kingston, Sarah E., Jernigan, Robert W., Fagan, William F., Braun, David R., and Braun, Michael J. 2012. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F21407">Genomic variation in cline shape across a hybrid zone</a>." <em>Ecology and Evolution</em>. 2 (11):2737&ndash;2748. <a href="https://doi.org/10.1002/ece3.375">https://doi.org/10.1002/ece3.375</a> en
dc.identifier.issn 2045-7758
dc.identifier.uri http://hdl.handle.net/10088/21407
dc.description.abstract Hybrid zones are unique biological interfaces that reveal both population level and species level evolutionary processes. A genome-scale approach to assess gene flow across hybrid zones is vital, and now possible. In Mexican towhees (genus Pipilo), several morphological hybrid gradients exist. We completed a genome survey across one such gradient (9 populations, 140 birds) using mitochondrial DNA, 28 isozyme, and 377 AFLP markers. To assess variation in introgression among loci, cline parameters (i.e., width, center) for the 61 clinally varying loci were estimated and compiled into genomic distributions for tests against three empirical models spanning the range of observed cline shape. No single model accounts for observed variation in cline shape among loci. Numerous backcross individuals near the gradient center confirm a hybrid origin for these populations, contrary to a previous hypothesis based on social mimicry and character displacement. In addition, the observed variation does not bin into well-defined categories of locus types (e.g., neutral vs. highly selected). Our multi-locus analysis reveals cross-genomic variation in selective constraints on gene flow and locus-specific flexibility in the permeability of the interspecies membrane. en
dc.relation.ispartof Ecology and Evolution en
dc.title Genomic variation in cline shape across a hybrid zone en
dc.type Journal Article en
dc.identifier.srbnumber 113807
dc.identifier.doi 10.1002/ece3.375
rft.jtitle Ecology and Evolution
rft.volume 2
rft.issue 11
rft.spage 2737
rft.epage 2748
dc.description.SIUnit NH-Vertebrate Zoology en
dc.description.SIUnit NMNH en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 2737
dc.citation.epage 2748


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