Isolation by distance and selection effects on genetic structure of sardines Sardina pilchardus Walbaum
Identifieur interne : 000B82 ( Main/Exploration ); précédent : 000B81; suivant : 000B83Isolation by distance and selection effects on genetic structure of sardines Sardina pilchardus Walbaum
Auteurs : V. Laurent [Grèce] ; B. Caneco [Grèce] ; A. Magoulas [Grèce] ; S. Planes [Grèce, France]Source :
- Journal of Fish Biology [ 0022-1112 ] ; 2007-08.
English descriptors
Abstract
Allozyme data were used to analyse the genetic structure of Sardina pilchardus populations. Fifty samples from 15 locations between the North Sea and Mauritania, including samples from the Azores, Madeira and the Mediterranean Sea, were surveyed. A weak but significant structure was found between all samples (FST= 0.057, P < 0·001). This structure results from a change in the most common allele of SOD* between the North African and the Azores populations separated by the greatest distance. This locus seemed to be under selective pressure according to the test of neutrality, and the variations in allele frequencies may be explained due to isolation by distance (IBD) of coastal populations (from Mauritania to the North Sea) (r= 0·86, P < 0·001). When SOD* was removed from the analyses, IBD was not observed in coastal populations (r= 0·236, P > 0·05) but was observed over the whole range (r= 0·321, P= 0·05). The genetic structure of S. pilchardus is driven by both IBD and selective processes.
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DOI: 10.1111/j.1095-8649.2007.01450.x
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Laurent</name><affiliation wicri:level="1"><country xml:lang="fr">Grèce</country><wicri:regionArea>* Ecole Pratique des Hautes Etudes – UMR CNRS 8046, Laboratoire d’Ichtyoécologie Tropicale et Méditerranéenne, Université de Perpignan, 52, Avenue Paul Alduy, 66860 Perpignan cedex, France , † IPIMAR, Av. Brasília, 1449‐006 Lisbon, Portugal and ‡ Hellenic Centre for Marine Research, Crete, P. O. Box 2214, Heraklion 71003, Crete</wicri:regionArea><wicri:noRegion>Crete</wicri:noRegion></affiliation></author><author><name sortKey="Caneco, B" sort="Caneco, B" uniqKey="Caneco B" first="B." last="Caneco">B. Caneco</name><affiliation wicri:level="1"><country xml:lang="fr">Grèce</country><wicri:regionArea>* Ecole Pratique des Hautes Etudes – UMR CNRS 8046, Laboratoire d’Ichtyoécologie Tropicale et Méditerranéenne, Université de Perpignan, 52, Avenue Paul Alduy, 66860 Perpignan cedex, France , † IPIMAR, Av. Brasília, 1449‐006 Lisbon, Portugal and ‡ Hellenic Centre for Marine Research, Crete, P. O. Box 2214, Heraklion 71003, Crete</wicri:regionArea><wicri:noRegion>Crete</wicri:noRegion></affiliation></author><author><name sortKey="Magoulas, A" sort="Magoulas, A" uniqKey="Magoulas A" first="A." last="Magoulas">A. Magoulas</name><affiliation wicri:level="1"><country xml:lang="fr">Grèce</country><wicri:regionArea>* Ecole Pratique des Hautes Etudes – UMR CNRS 8046, Laboratoire d’Ichtyoécologie Tropicale et Méditerranéenne, Université de Perpignan, 52, Avenue Paul Alduy, 66860 Perpignan cedex, France , † IPIMAR, Av. Brasília, 1449‐006 Lisbon, Portugal and ‡ Hellenic Centre for Marine Research, Crete, P. O. Box 2214, Heraklion 71003, Crete</wicri:regionArea><wicri:noRegion>Crete</wicri:noRegion></affiliation></author><author><name sortKey="Planes, S" sort="Planes, S" uniqKey="Planes S" first="S." last="Planes">S. Planes</name><affiliation wicri:level="1"><country xml:lang="fr">Grèce</country><wicri:regionArea>* Ecole Pratique des Hautes Etudes – UMR CNRS 8046, Laboratoire d’Ichtyoécologie Tropicale et Méditerranéenne, Université de Perpignan, 52, Avenue Paul Alduy, 66860 Perpignan cedex, France , † IPIMAR, Av. Brasília, 1449‐006 Lisbon, Portugal and ‡ Hellenic Centre for Marine Research, Crete, P. O. Box 2214, Heraklion 71003, Crete</wicri:regionArea><wicri:noRegion>Crete</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">France</country></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Fish Biology</title><idno type="ISSN">0022-1112</idno><idno type="eISSN">1095-8649</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2007-08">2007-08</date><biblScope unit="volume">71</biblScope><biblScope unit="supplement">sa</biblScope><biblScope unit="page" from="1">1</biblScope><biblScope unit="page" to="17">17</biblScope></imprint><idno type="ISSN">0022-1112</idno></series><idno type="istex">310F12BAA233D4D1793BE6A632BA5BB16C28D865</idno><idno type="DOI">10.1111/j.1095-8649.2007.01450.x</idno><idno type="ArticleID">JFB1450</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-1112</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>European sardine</term><term>SOD* locus</term><term>allozyme</term><term>pelagic fishes</term><term>population genetics</term><term>whole range</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Allozyme data were used to analyse the genetic structure of Sardina pilchardus populations. Fifty samples from 15 locations between the North Sea and Mauritania, including samples from the Azores, Madeira and the Mediterranean Sea, were surveyed. A weak but significant structure was found between all samples (FST= 0.057, P < 0·001). This structure results from a change in the most common allele of SOD* between the North African and the Azores populations separated by the greatest distance. This locus seemed to be under selective pressure according to the test of neutrality, and the variations in allele frequencies may be explained due to isolation by distance (IBD) of coastal populations (from Mauritania to the North Sea) (r= 0·86, P < 0·001). When SOD* was removed from the analyses, IBD was not observed in coastal populations (r= 0·236, P > 0·05) but was observed over the whole range (r= 0·321, P= 0·05). The genetic structure of S. pilchardus is driven by both IBD and selective processes.</div></front></TEI><affiliations><list><country><li>France</li><li>Grèce</li></country></list><tree><country name="Grèce"><noRegion><name sortKey="Laurent, V" sort="Laurent, V" uniqKey="Laurent V" first="V." last="Laurent">V. Laurent</name></noRegion><name sortKey="Caneco, B" sort="Caneco, B" uniqKey="Caneco B" first="B." last="Caneco">B. Caneco</name><name sortKey="Magoulas, A" sort="Magoulas, A" uniqKey="Magoulas A" first="A." last="Magoulas">A. Magoulas</name><name sortKey="Planes, S" sort="Planes, S" uniqKey="Planes S" first="S." last="Planes">S. Planes</name></country><country name="France"><noRegion><name sortKey="Planes, S" sort="Planes, S" uniqKey="Planes S" first="S." last="Planes">S. Planes</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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