Island selection on mammalian life-histories: genetic differentiation in offspring size

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dc.contributor.author Mappes, Tapio
dc.contributor.author Grapputo, Alessandro
dc.contributor.author Hakkarainen, Harri
dc.contributor.author Huhta, Esa
dc.contributor.author Koskela, Esa
dc.contributor.author Saunanen, Raimo
dc.contributor.author Suorsa, Petri
dc.date.accessioned 2011-05-13T06:41:55Z
dc.date.available 2011-05-13T06:41:55Z
dc.date.issued 2008
dc.identifier.citation Mappes, T., Grapputo, A., Hakkarainen, H., Huhta, E., Koskela, E., Saunanen, R. & Suorsa, P. (2008). Island selection on mammalian life-histories: genetic differentiation in offspring size. BMC Evolutionary Biology, 8:296. doi:10.1186/1471-2148-8-296
dc.identifier.issn 1471-2148
dc.identifier.uri http://hdl.handle.net/123456789/26955
dc.description.abstract BACKGROUND: Since Darwin's pioneering work, evolutionary changes in isolated island populations of vertebrates have continued to provide the strongest evidence for the theory of natural selection. Besides macro-evolutionary changes, micro-evolutionary changes and the relative importance of natural selection vs. genetic drift are under intense investigation. Our study focuses on the genetic differentiation in morphological and life-history traits in insular populations of a small mammal the bank vole Myodes glareolus. RESULTS: Our results do not support the earlier findings for larger adult size or lower reproductive effort in insular populations of small mammals. However, the individuals living on islands produced larger offspring than individuals living on the mainland. Genetic differentiation in offspring size was further confirmed by the analyses of quantitative genetics in lab. In insular populations, genetic differentiation in offspring size simultaneously decreases the additive genetic variation (VA) for that trait. Furthermore, our analyses of differentiation in neutral marker loci (Fst) indicate that VA is less than expected on the basis of genetic drift alone, and thus, a lower VA in insular populations could be caused by natural selection. CONCLUSION: We believe that different selection pressures (e.g. higher intraspecific competition) in an insular environment might favour larger offspring size in small mammals. Island selection for larger offspring could be the preliminary mechanism in a process which could eventually lead to a smaller litter size and lower reproductive effort frequently found in insular vertebrates. en
dc.language.iso eng
dc.publisher BioMed Central
dc.relation.ispartofseries BMC Evolutionary Biology
dc.rights © 2008 Mappes et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.rights.uri http://creativecommons.org/licenses/by/2.0
dc.subject.other saariselektio en
dc.subject.other lisääntymispanostus en
dc.subject.other poikasen koko en
dc.subject.other elinkiertojen evoluutio en
dc.subject.other island selection en
dc.subject.other reproductive effort en
dc.subject.other offspring size en
dc.subject.other evolution of life-histories en
dc.title Island selection on mammalian life-histories: genetic differentiation in offspring size
dc.type Article en
dc.identifier.urn URN:NBN:fi:jyu-2011051310795
dc.subject.kota 118
dc.contributor.laitos Bio- ja ympäristötieteiden laitos fi
dc.contributor.laitos Department of Biological and Environmental Science en
dc.type.uri http://purl.org/eprint/type/JournalArticle
dc.identifier.doi doi:10.1186/1471-2148-8-296
dc.description.version Published PDF
eprint.status http://purl.org/eprint/type/status/PeerReviewed

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