Demographic history and population structure of the Antarctic silverfish Pleuragramma antarcticum
Identifieur interne : 001269 ( Istex/Corpus ); précédent : 001268; suivant : 001270Demographic history and population structure of the Antarctic silverfish Pleuragramma antarcticum
Auteurs : L. Zane ; S. Marcato ; L. Bargelloni ; E. Bortolotto ; C. Papetti ; M. Simonato ; V. Varotto ; T. PatarnelloSource :
- Molecular Ecology [ 0962-1083 ] ; 2006-12.
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Abstract
The Antarctic silverfish Pleuragramma antarcticum (Nototheniidae) is the most abundant pelagic fish inhabiting Antarctic waters. In this study we investigated, through partial sequencing of the D‐loop mitochondrial region, samples collected at four different locations in the Southern Ocean, three in the Atlantic and one in the Pacific sector. Sampling was replicated in two different years at two locations. Sequence analysis showed a remarkably high polymorphism, with 110 haplotypes over the 256 investigated specimens, and about 80% of haplotypes occurring only once. Neutrality tests indicated that all samples were not at mutation–drift equilibrium, and suggested a past population expansion. This result was supported by the presence of a star‐like topology in the D‐loop gene tree, and by results of mismatch distribution. The start of the expansion was dated, using a specifically calibrated clock, between 111 and 126 thousand years ago. This value corresponds to the start of the cooling period that led to the last glaciation peak, and is in close agreement with a recently suggested range expansion for pelagic Antarctic ecosystems. Analysis of molecular variation indicated a small, though highly significant, value of differentiation between samples. This result, together with the lack of association between clades and geographical locations, indicates a weak population structure for the species.
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DOI: 10.1111/j.1365-294X.2006.03105.x
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ISTEX:267C43835C6524596BB127FDC9D28343EE459525Le document en format XML
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In this study we investigated, through partial sequencing of the D‐loop mitochondrial region, samples collected at four different locations in the Southern Ocean, three in the Atlantic and one in the Pacific sector. Sampling was replicated in two different years at two locations. Sequence analysis showed a remarkably high polymorphism, with 110 haplotypes over the 256 investigated specimens, and about 80% of haplotypes occurring only once. Neutrality tests indicated that all samples were not at mutation–drift equilibrium, and suggested a past population expansion. This result was supported by the presence of a star‐like topology in the D‐loop gene tree, and by results of mismatch distribution. The start of the expansion was dated, using a specifically calibrated clock, between 111 and 126 thousand years ago. This value corresponds to the start of the cooling period that led to the last glaciation peak, and is in close agreement with a recently suggested range expansion for pelagic Antarctic ecosystems. Analysis of molecular variation indicated a small, though highly significant, value of differentiation between samples. This result, together with the lack of association between clades and geographical locations, indicates a weak population structure for the species.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>L. ZANE</name><affiliations><json:string>Dipartimento di Biologia, Università di Padova, Via G. Colombo, 3, I‐35121 Padova, Italy,</json:string></affiliations></json:item><json:item><name>S. MARCATO</name><affiliations><json:string>Dipartimento di Biologia, Università di Padova, Via G. Colombo, 3, I‐35121 Padova, Italy,</json:string></affiliations></json:item><json:item><name>L. 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In this study we investigated, through partial sequencing of the D‐loop mitochondrial region, samples collected at four different locations in the Southern Ocean, three in the Atlantic and one in the Pacific sector. Sampling was replicated in two different years at two locations. Sequence analysis showed a remarkably high polymorphism, with 110 haplotypes over the 256 investigated specimens, and about 80% of haplotypes occurring only once. Neutrality tests indicated that all samples were not at mutation–drift equilibrium, and suggested a past population expansion. This result was supported by the presence of a star‐like topology in the D‐loop gene tree, and by results of mismatch distribution. The start of the expansion was dated, using a specifically calibrated clock, between 111 and 126 thousand years ago. This value corresponds to the start of the cooling period that led to the last glaciation peak, and is in close agreement with a recently suggested range expansion for pelagic Antarctic ecosystems. Analysis of molecular variation indicated a small, though highly significant, value of differentiation between samples. 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In this study we investigated, through partial sequencing of the D‐loop mitochondrial region, samples collected at four different locations in the Southern Ocean, three in the Atlantic and one in the Pacific sector. Sampling was replicated in two different years at two locations. Sequence analysis showed a remarkably high polymorphism, with 110 haplotypes over the 256 investigated specimens, and about 80% of haplotypes occurring only once. Neutrality tests indicated that all samples were not at mutation–drift equilibrium, and suggested a past population expansion. This result was supported by the presence of a star‐like topology in the D‐loop gene tree, and by results of mismatch distribution. The start of the expansion was dated, using a specifically calibrated clock, between 111 and 126 thousand years ago. This value corresponds to the start of the cooling period that led to the last glaciation peak, and is in close agreement with a recently suggested range expansion for pelagic Antarctic ecosystems. Analysis of molecular variation indicated a small, though highly significant, value of differentiation between samples. This result, together with the lack of association between clades and geographical locations, indicates a weak population structure for the species.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>D‐loop</term></item><item><term>genetic differentiation</term></item><item><term>mitochondrial DNA</term></item><item><term>Pleuragramma antarcticum</term></item><item><term>population expansion</term></item><item><term>Southern Ocean</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2006-12">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/267C43835C6524596BB127FDC9D28343EE459525/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Publishing Ltd</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1365-294X</doi><issn type="print">0962-1083</issn><issn type="electronic">1365-294X</issn><idGroup><id type="product" value="MEC"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="MOLECULAR ECOLOGY">Molecular Ecology</title></titleGroup></publicationMeta><publicationMeta level="part" position="12014"><doi origin="wiley">10.1111/mec.2006.15.issue-14</doi><numberingGroup><numbering type="journalVolume" number="15">15</numbering><numbering type="journalIssue" number="14">14</numbering></numberingGroup><coverDate startDate="2006-12">December 2006</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="15" status="forIssue"><doi origin="wiley">10.1111/j.1365-294X.2006.03105.x</doi><idGroup><id type="unit" value="MEC3105"></id></idGroup><countGroup><count type="pageTotal" number="13"></count></countGroup><titleGroup><title type="tocHeading1">ORIGINAL ARTICLES</title><title type="tocHeading2">Phylogeography, Speciation and Hybridization</title></titleGroup><eventGroup><event type="firstOnline" date="2006-09-06"></event><event type="publishedOnlineFinalForm" date="2006-09-06"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.12 mode:FullText" date="2010-07-09"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:4.0.1" date="2014-03-20"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-31"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="4499">4499</numbering><numbering type="pageLast" number="4511">4511</numbering></numberingGroup><correspondenceTo> Prof. Tomaso Patarnello,. Fax: +39–0498276209; E‐mail: <email>patarnel@civ.bio.unipd.it</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:MEC.MEC3105.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received 22 May 2006; accepted 10 July 2006</unparsedEditorialHistory><countGroup><count type="figureTotal" number="3"></count><count type="tableTotal" number="5"></count><count type="formulaTotal" number="0"></count><count type="referenceTotal" number="63"></count><count type="wordTotal" number="6488"></count></countGroup><titleGroup><title type="main">Demographic history and population structure of the Antarctic silverfish <i>Pleuragramma antarcticum</i></title><title type="shortAuthors">L. ZANE <i>ET AL.</i></title><title type="short"><i>PLEURAGRAMMA ANTARCTICUM</i> POPULATION GENETICS</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>L.</givenNames><familyName>ZANE</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a1"><personName><givenNames>S.</givenNames><familyName>MARCATO</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a2"><personName><givenNames>L.</givenNames><familyName>BARGELLONI</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a1"><personName><givenNames>E.</givenNames><familyName>BORTOLOTTO</familyName></personName></creator><creator creatorRole="author" xml:id="cr5" affiliationRef="#a1"><personName><givenNames>C.</givenNames><familyName>PAPETTI</familyName></personName></creator><creator creatorRole="author" xml:id="cr6" affiliationRef="#a3"><personName><givenNames>M.</givenNames><familyName>SIMONATO</familyName></personName></creator><creator creatorRole="author" xml:id="cr7" affiliationRef="#a1"><personName><givenNames>V.</givenNames><familyName>VAROTTO</familyName></personName></creator><creator creatorRole="author" xml:id="cr8" affiliationRef="#a1 #a2"><personName><givenNames>T.</givenNames><familyName>PATARNELLO</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="IT"><unparsedAffiliation>Dipartimento di Biologia, Università di Padova, Via G. Colombo, 3, I‐35121 Padova, Italy,</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="IT"><unparsedAffiliation>Dipartimento di Sanità Pubblica, Patologia Comparata e Igiene Veterinaria, Agripolis, Università di Padova, Via Romea, 16, I‐35020 Legnaro (Pd), Italy,</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="IT"><unparsedAffiliation>Dipartimento di Agronomia Ambientale e Produzioni Vegetali Entomologia, Agripolis, Università di Padova, Via Romea 16, I‐35020 Legnaro (Pd), Italy</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1"><i>D‐loop</i></keyword><keyword xml:id="k2">genetic differentiation</keyword><keyword xml:id="k3">mitochondrial DNA</keyword><keyword xml:id="k4"><i>Pleuragramma antarcticum</i></keyword><keyword xml:id="k5">population expansion</keyword><keyword xml:id="k6">Southern Ocean</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>The Antarctic silverfish <i>Pleuragramma antarcticum</i> (Nototheniidae) is the most abundant pelagic fish inhabiting Antarctic waters. In this study we investigated, through partial sequencing of the <i>D‐loop</i> mitochondrial region, samples collected at four different locations in the Southern Ocean, three in the Atlantic and one in the Pacific sector. Sampling was replicated in two different years at two locations. Sequence analysis showed a remarkably high polymorphism, with 110 haplotypes over the 256 investigated specimens, and about 80% of haplotypes occurring only once. Neutrality tests indicated that all samples were not at mutation–drift equilibrium, and suggested a past population expansion. This result was supported by the presence of a star‐like topology in the <i>D‐loop</i> gene tree, and by results of mismatch distribution. The start of the expansion was dated, using a specifically calibrated clock, between 111 and 126 thousand years ago. This value corresponds to the start of the cooling period that led to the last glaciation peak, and is in close agreement with a recently suggested range expansion for pelagic Antarctic ecosystems. Analysis of molecular variation indicated a small, though highly significant, value of differentiation between samples. This result, together with the lack of association between clades and geographical locations, indicates a weak population structure for the species.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Demographic history and population structure of the Antarctic silverfish Pleuragramma antarcticum</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>PLEURAGRAMMA ANTARCTICUM POPULATION GENETICS</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Demographic history and population structure of the Antarctic silverfish Pleuragramma antarcticum</title></titleInfo><name type="personal"><namePart type="given">L.</namePart><namePart type="family">ZANE</namePart><affiliation>Dipartimento di Biologia, Università di Padova, Via G. Colombo, 3, I‐35121 Padova, Italy,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">MARCATO</namePart><affiliation>Dipartimento di Biologia, Università di Padova, Via G. Colombo, 3, I‐35121 Padova, Italy,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L.</namePart><namePart type="family">BARGELLONI</namePart><affiliation>Dipartimento di Sanità Pubblica, Patologia Comparata e Igiene Veterinaria, Agripolis, Università di Padova, Via Romea, 16, I‐35020 Legnaro (Pd), Italy,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E.</namePart><namePart type="family">BORTOLOTTO</namePart><affiliation>Dipartimento di Biologia, Università di Padova, Via G. Colombo, 3, I‐35121 Padova, Italy,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C.</namePart><namePart type="family">PAPETTI</namePart><affiliation>Dipartimento di Biologia, Università di Padova, Via G. Colombo, 3, I‐35121 Padova, Italy,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">SIMONATO</namePart><affiliation>Dipartimento di Agronomia Ambientale e Produzioni Vegetali Entomologia, Agripolis, Università di Padova, Via Romea 16, I‐35020 Legnaro (Pd), Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V.</namePart><namePart type="family">VAROTTO</namePart><affiliation>Dipartimento di Biologia, Università di Padova, Via G. Colombo, 3, I‐35121 Padova, Italy,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T.</namePart><namePart type="family">PATARNELLO</namePart><affiliation>Dipartimento di Biologia, Università di Padova, Via G. Colombo, 3, I‐35121 Padova, Italy,</affiliation><affiliation>Dipartimento di Sanità Pubblica, Patologia Comparata e Igiene Veterinaria, Agripolis, Università di Padova, Via Romea, 16, I‐35020 Legnaro (Pd), Italy,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2006-12</dateIssued><edition>Received 22 May 2006; accepted 10 July 2006</edition><copyrightDate encoding="w3cdtf">2006</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">3</extent><extent unit="tables">5</extent><extent unit="references">63</extent><extent unit="words">6488</extent></physicalDescription><abstract lang="en">The Antarctic silverfish Pleuragramma antarcticum (Nototheniidae) is the most abundant pelagic fish inhabiting Antarctic waters. In this study we investigated, through partial sequencing of the D‐loop mitochondrial region, samples collected at four different locations in the Southern Ocean, three in the Atlantic and one in the Pacific sector. Sampling was replicated in two different years at two locations. Sequence analysis showed a remarkably high polymorphism, with 110 haplotypes over the 256 investigated specimens, and about 80% of haplotypes occurring only once. Neutrality tests indicated that all samples were not at mutation–drift equilibrium, and suggested a past population expansion. This result was supported by the presence of a star‐like topology in the D‐loop gene tree, and by results of mismatch distribution. The start of the expansion was dated, using a specifically calibrated clock, between 111 and 126 thousand years ago. This value corresponds to the start of the cooling period that led to the last glaciation peak, and is in close agreement with a recently suggested range expansion for pelagic Antarctic ecosystems. Analysis of molecular variation indicated a small, though highly significant, value of differentiation between samples. This result, together with the lack of association between clades and geographical locations, indicates a weak population structure for the species.</abstract><subject lang="en"><genre>keywords</genre><topic>D‐loop</topic><topic>genetic differentiation</topic><topic>mitochondrial DNA</topic><topic>Pleuragramma antarcticum</topic><topic>population expansion</topic><topic>Southern Ocean</topic></subject><relatedItem type="host"><titleInfo><title>Molecular Ecology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0962-1083</identifier><identifier type="eISSN">1365-294X</identifier><identifier type="DOI">10.1111/(ISSN)1365-294X</identifier><identifier type="PublisherID">MEC</identifier><part><date>2006</date><detail type="volume"><caption>vol.</caption><number>15</number></detail><detail type="issue"><caption>no.</caption><number>14</number></detail><extent unit="pages"><start>4499</start><end>4511</end><total>13</total></extent></part></relatedItem><identifier type="istex">267C43835C6524596BB127FDC9D28343EE459525</identifier><identifier type="DOI">10.1111/j.1365-294X.2006.03105.x</identifier><identifier type="ArticleID">MEC3105</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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