Atlantic sturgeons (Acipenser sturio, Acipenser oxyrinchus): American females successful in Europe.
Identifieur interne : 000B60 ( Main/Exploration ); précédent : 000B59; suivant : 000B61Atlantic sturgeons (Acipenser sturio, Acipenser oxyrinchus): American females successful in Europe.
Auteurs : Ralph Tiedemann [Allemagne] ; Katja Moll ; Kirsten B. Paulus ; Michael Scheer ; Patrick Williot [France] ; Ryszard Bartel ; Jörn Gessner ; Frank KirschbaumSource :
- Die Naturwissenschaften [ 0028-1042 ] ; 2007.
Descripteurs français
- Wicri :
- geographic : Canada.
English descriptors
- KwdEn :
- MESH :
- chemical , genetics : DNA, Mitochondrial.
- chemical : DNA Primers.
- geographic : Atlantic Ocean, Canada, Europe.
- classification : Fishes.
- genetics : Fishes.
- Animals, Ecosystem, Female, Major Histocompatibility Complex, Phylogeny, Polymerase Chain Reaction, Polymorphism, Single Nucleotide.
Abstract
Recent molecular data on the maternally inherited mitochondrial (mt) DNA have challenged the traditional view that the now extinct Baltic sturgeon population belonged to the European sturgeon Acipenser sturio. Instead, there is evidence that American sea sturgeon Acipenser oxyrinchus historically immigrated into the Baltic Sea. In this study, we test the hypothesis that A. oxyrinchus introgressed into, rather than replaced, the A. sturio population in the Baltic. We established four single nucleotide polymorphisms (SNPs) in the nuclear MHC II antigen gene with a species-specific SNP pattern. Using an ancient DNA approach and two independent lines of molecular evidence (sequencing of allele-specific clones, SNaPshot), we detected both A. sturio and A. oxyrinchus alleles in the available museum material of the now extinct Baltic sturgeon population. The hybrid nature of the Baltic population was further confirmed by very high levels of heterozygosity. It had been previously postulated that the immigration of the cold-adapted A. oxyrinchus into the Baltic occurred during the Medieval Little Ice Age, when temperature likely dropped below the degree inducing spawning in A. sturio. Under this scenario, our new findings suggest that the genetic mosaic pattern in the Baltic sturgeon population (oxyrinchus mtDNA, sturio and oxyrinchus MHC alleles) is possibly caused by sex-biased introgression where spawning was largely restricted to immigrating American females, while fertilization was predominantly achieved by abundant local European males. The hybrid nature of the former Baltic sturgeon population should be taken into account in the current reintroduction measures.
DOI: 10.1007/s00114-006-0175-1
PubMed: 17111181
Affiliations:
- Allemagne, France
- Aquitaine, Brandebourg, Nouvelle-Aquitaine
- Bordeaux, Cestas, Potsdam
- Cemagref - centre de Bordeaux, Centre national du machinisme agricole, du génie rural, des eaux et des forêts, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture, Université de Potsdam
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Le document en format XML
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Paulus</name></author><author><name sortKey="Scheer, Michael" sort="Scheer, Michael" uniqKey="Scheer M" first="Michael" last="Scheer">Michael Scheer</name></author><author><name sortKey="Williot, Patrick" sort="Williot, Patrick" uniqKey="Williot P" first="Patrick" last="Williot">Patrick Williot</name><affiliation><country>France</country><placeName><settlement type="city">Bordeaux</settlement><settlement type="town">Cestas</settlement><region type="region" nuts="2">Nouvelle-Aquitaine</region><region type="old region" nuts="2">Aquitaine</region></placeName><orgName type="laboratoire" n="5">Cemagref - centre de Bordeaux</orgName><orgName type="institution">Centre national du machinisme agricole, du génie rural, des eaux et des forêts</orgName><orgName type="institution">Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture</orgName></affiliation></author><author><name sortKey="Bartel, Ryszard" sort="Bartel, Ryszard" uniqKey="Bartel R" first="Ryszard" last="Bartel">Ryszard Bartel</name></author><author><name sortKey="Gessner, Jorn" sort="Gessner, Jorn" uniqKey="Gessner J" first="Jörn" last="Gessner">Jörn Gessner</name></author><author><name sortKey="Kirschbaum, Frank" sort="Kirschbaum, Frank" uniqKey="Kirschbaum F" first="Frank" last="Kirschbaum">Frank Kirschbaum</name></author></analytic><series><title level="j">Die Naturwissenschaften</title><idno type="ISSN">0028-1042</idno><imprint><date when="2007" type="published">2007</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Atlantic Ocean</term><term>Canada</term><term>DNA Primers</term><term>DNA, Mitochondrial (genetics)</term><term>Ecosystem</term><term>Europe</term><term>Female</term><term>Fishes (classification)</term><term>Fishes (genetics)</term><term>Major Histocompatibility Complex</term><term>Phylogeny</term><term>Polymerase Chain Reaction</term><term>Polymorphism, Single Nucleotide</term></keywords><keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>DNA, Mitochondrial</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>DNA Primers</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>Atlantic Ocean</term><term>Canada</term><term>Europe</term></keywords><keywords scheme="MESH" qualifier="classification" xml:lang="en"><term>Fishes</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Fishes</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Ecosystem</term><term>Female</term><term>Major Histocompatibility Complex</term><term>Phylogeny</term><term>Polymerase Chain Reaction</term><term>Polymorphism, Single Nucleotide</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Canada</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Recent molecular data on the maternally inherited mitochondrial (mt) DNA have challenged the traditional view that the now extinct Baltic sturgeon population belonged to the European sturgeon Acipenser sturio. Instead, there is evidence that American sea sturgeon Acipenser oxyrinchus historically immigrated into the Baltic Sea. In this study, we test the hypothesis that A. oxyrinchus introgressed into, rather than replaced, the A. sturio population in the Baltic. We established four single nucleotide polymorphisms (SNPs) in the nuclear MHC II antigen gene with a species-specific SNP pattern. Using an ancient DNA approach and two independent lines of molecular evidence (sequencing of allele-specific clones, SNaPshot), we detected both A. sturio and A. oxyrinchus alleles in the available museum material of the now extinct Baltic sturgeon population. The hybrid nature of the Baltic population was further confirmed by very high levels of heterozygosity. It had been previously postulated that the immigration of the cold-adapted A. oxyrinchus into the Baltic occurred during the Medieval Little Ice Age, when temperature likely dropped below the degree inducing spawning in A. sturio. Under this scenario, our new findings suggest that the genetic mosaic pattern in the Baltic sturgeon population (oxyrinchus mtDNA, sturio and oxyrinchus MHC alleles) is possibly caused by sex-biased introgression where spawning was largely restricted to immigrating American females, while fertilization was predominantly achieved by abundant local European males. The hybrid nature of the former Baltic sturgeon population should be taken into account in the current reintroduction measures.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>France</li></country><region><li>Aquitaine</li><li>Brandebourg</li><li>Nouvelle-Aquitaine</li></region><settlement><li>Bordeaux</li><li>Cestas</li><li>Potsdam</li></settlement><orgName><li>Cemagref - centre de Bordeaux</li><li>Centre national du machinisme agricole, du génie rural, des eaux et des forêts</li><li>Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture</li><li>Université de Potsdam</li></orgName></list><tree><noCountry><name sortKey="Bartel, Ryszard" sort="Bartel, Ryszard" uniqKey="Bartel R" first="Ryszard" last="Bartel">Ryszard Bartel</name><name sortKey="Gessner, Jorn" sort="Gessner, Jorn" uniqKey="Gessner J" first="Jörn" last="Gessner">Jörn Gessner</name><name sortKey="Kirschbaum, Frank" sort="Kirschbaum, Frank" uniqKey="Kirschbaum F" first="Frank" last="Kirschbaum">Frank Kirschbaum</name><name sortKey="Moll, Katja" sort="Moll, Katja" uniqKey="Moll K" first="Katja" last="Moll">Katja Moll</name><name sortKey="Paulus, Kirsten B" sort="Paulus, Kirsten B" uniqKey="Paulus K" first="Kirsten B" last="Paulus">Kirsten B. Paulus</name><name sortKey="Scheer, Michael" sort="Scheer, Michael" uniqKey="Scheer M" first="Michael" last="Scheer">Michael Scheer</name></noCountry><country name="Allemagne"><region name="Brandebourg"><name sortKey="Tiedemann, Ralph" sort="Tiedemann, Ralph" uniqKey="Tiedemann R" first="Ralph" last="Tiedemann">Ralph Tiedemann</name></region></country><country name="France"><region name="Nouvelle-Aquitaine"><name sortKey="Williot, Patrick" sort="Williot, Patrick" uniqKey="Williot P" first="Patrick" last="Williot">Patrick Williot</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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