| Sex at the margins: parthenogenesis vs. facultative and obligate sex in a Neotropical ant. | |
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MedLine Citation:
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PMID: 23145575 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Geographic parthenogenesis is a distribution pattern, in which parthenogenetic populations tend to live in marginal habitats, at higher latitudes and altitudes and island-like habitats compared with the sexual forms. The facultatively parthenogenetic ant Platythyrea punctata is thought to exhibit this general pattern throughout its wide range in Central America and the Caribbean Islands. Workers of P. punctata from the Caribbean produce diploid female offspring from unfertilized eggs by thelytokous parthenogenesis, and mated females and males are rare. In contrast, workers in one colony from Costa Rica were incapable of thelytoky; instead mated workers produced all female offspring. Because sample sizes were very low in former studies, we here use microsatellite markers and explicit tests of thelytoky to examine the population genetic structure of ancestral and derived populations of P. punctata throughout the Caribbean and Central America. Populations from the Caribbean islands were fully capable of parthenogenesis, and population genetic signatures indicate that this is the predominant mode of reproduction, although males are occasionally produced. In contrast, the northernmost population on the mainland (Texas) showed signatures of sexual reproduction, and individuals were incapable of reproduction by thelytoky. Contrary to expectations from a geographic parthenogenesis distribution pattern, most parts of the mainland populations were found to be facultatively thelytokous, with population genetic signatures of both sexual and parthenogenetic reproduction. |
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Authors:
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K Kellner; J N Seal; J Heinze |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-11-12 |
Journal Detail:
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Title: Journal of evolutionary biology Volume: - ISSN: 1420-9101 ISO Abbreviation: J. Evol. Biol. Publication Date: 2012 Nov |
Date Detail:
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Created Date: 2012-11-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8809954 Medline TA: J Evol Biol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2012 The Authors. Journal of Evolutionary Biology © 2012 European Society For Evolutionary Biology. |
Affiliation:
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Biologie I, University of Regensburg, Regensburg, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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