Genome duplication events and functional reduction of ploidy levels in sturgeon (Acipenser, Huso and Scaphirhynchus).
Identifieur interne : 000626 ( PubMed/Curation ); précédent : 000625; suivant : 000627Genome duplication events and functional reduction of ploidy levels in sturgeon (Acipenser, Huso and Scaphirhynchus).
Auteurs : A. Ludwig [Allemagne] ; N M Belfiore ; C. Pitra ; V. Svirsky ; I. JenneckensSource :
- Genetics [ 0016-6731 ] ; 2001.
English descriptors
- KwdEn :
- MESH :
- chemical , genetics : Cytochrome b Group.
- genetics : Fishes, Microsatellite Repeats.
- Animals, Chromosome Mapping, Gene Duplication, Genome, Phylogeny, Ploidies.
Abstract
Sturgeon (order Acipenserformes) provide an ideal taxonomic context for examination of genome duplication events. Multiple levels of ploidy exist among these fish. In a novel microsatellite approach, data from 962 fish from 20 sturgeon species were used for analysis of ploidy in sturgeon. Allele numbers in a sample of individuals were assessed at six microsatellite loci. Species with approximately 120 chromosomes are classified as functional diploid species, species with approximately 250 chromosomes as functional tetraploid species, and with approximately 500 chromosomes as functional octaploids. A molecular phylogeny of the sturgeon was determined on the basis of sequences of the entire mitochondrial cytochrome b gene. By mapping the estimated levels of ploidy on this proposed phylogeny we demonstrate that (I) polyploidization events independently occurred in the acipenseriform radiation; (II) the process of functional genome reduction is nearly finished in species with approximately 120 chromosomes and more active in species with approximately 250 chromosomes and approximately 500 chromosomes; and (III) species with approximately 250 and approximately 500 chromosomes arose more recently than those with approximately 120 chromosomes. These results suggest that gene silencing, chromosomal rearrangements, and transposition events played an important role in the acipenseriform genome formation. Furthermore, this phylogeny is broadly consistent with previous hypotheses but reveals a highly supported oceanic (Atlantic-Pacific) subdivision within the Acipenser/Huso complex.
PubMed: 11454768
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Genome duplication events and functional reduction of ploidy levels in sturgeon (Acipenser, Huso and Scaphirhynchus).</title><author><name sortKey="Ludwig, A" sort="Ludwig, A" uniqKey="Ludwig A" first="A" last="Ludwig">A. Ludwig</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Freshwater Ecology and Inland Fisheries, 12561 Berlin, Germany. al@igb-berlin.de</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>Institute of Freshwater Ecology and Inland Fisheries, 12561 Berlin</wicri:regionArea></affiliation></author><author><name sortKey="Belfiore, N M" sort="Belfiore, N M" uniqKey="Belfiore N" first="N M" last="Belfiore">N M Belfiore</name></author><author><name sortKey="Pitra, C" sort="Pitra, C" uniqKey="Pitra C" first="C" last="Pitra">C. Pitra</name></author><author><name sortKey="Svirsky, V" sort="Svirsky, V" uniqKey="Svirsky V" first="V" last="Svirsky">V. Svirsky</name></author><author><name sortKey="Jenneckens, I" sort="Jenneckens, I" uniqKey="Jenneckens I" first="I" last="Jenneckens">I. Jenneckens</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2001">2001</date><idno type="RBID">pubmed:11454768</idno><idno type="pmid">11454768</idno><idno type="wicri:Area/PubMed/Corpus">000626</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000626</idno><idno type="wicri:Area/PubMed/Curation">000626</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000626</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Genome duplication events and functional reduction of ploidy levels in sturgeon (Acipenser, Huso and Scaphirhynchus).</title><author><name sortKey="Ludwig, A" sort="Ludwig, A" uniqKey="Ludwig A" first="A" last="Ludwig">A. Ludwig</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Freshwater Ecology and Inland Fisheries, 12561 Berlin, Germany. al@igb-berlin.de</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>Institute of Freshwater Ecology and Inland Fisheries, 12561 Berlin</wicri:regionArea></affiliation></author><author><name sortKey="Belfiore, N M" sort="Belfiore, N M" uniqKey="Belfiore N" first="N M" last="Belfiore">N M Belfiore</name></author><author><name sortKey="Pitra, C" sort="Pitra, C" uniqKey="Pitra C" first="C" last="Pitra">C. Pitra</name></author><author><name sortKey="Svirsky, V" sort="Svirsky, V" uniqKey="Svirsky V" first="V" last="Svirsky">V. Svirsky</name></author><author><name sortKey="Jenneckens, I" sort="Jenneckens, I" uniqKey="Jenneckens I" first="I" last="Jenneckens">I. Jenneckens</name></author></analytic><series><title level="j">Genetics</title><idno type="ISSN">0016-6731</idno><imprint><date when="2001" type="published">2001</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Chromosome Mapping</term><term>Cytochrome b Group (genetics)</term><term>Fishes (genetics)</term><term>Gene Duplication</term><term>Genome</term><term>Microsatellite Repeats (genetics)</term><term>Phylogeny</term><term>Ploidies</term></keywords><keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>Cytochrome b Group</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Fishes</term><term>Microsatellite Repeats</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Chromosome Mapping</term><term>Gene Duplication</term><term>Genome</term><term>Phylogeny</term><term>Ploidies</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Sturgeon (order Acipenserformes) provide an ideal taxonomic context for examination of genome duplication events. Multiple levels of ploidy exist among these fish. In a novel microsatellite approach, data from 962 fish from 20 sturgeon species were used for analysis of ploidy in sturgeon. Allele numbers in a sample of individuals were assessed at six microsatellite loci. Species with approximately 120 chromosomes are classified as functional diploid species, species with approximately 250 chromosomes as functional tetraploid species, and with approximately 500 chromosomes as functional octaploids. A molecular phylogeny of the sturgeon was determined on the basis of sequences of the entire mitochondrial cytochrome b gene. By mapping the estimated levels of ploidy on this proposed phylogeny we demonstrate that (I) polyploidization events independently occurred in the acipenseriform radiation; (II) the process of functional genome reduction is nearly finished in species with approximately 120 chromosomes and more active in species with approximately 250 chromosomes and approximately 500 chromosomes; and (III) species with approximately 250 and approximately 500 chromosomes arose more recently than those with approximately 120 chromosomes. These results suggest that gene silencing, chromosomal rearrangements, and transposition events played an important role in the acipenseriform genome formation. Furthermore, this phylogeny is broadly consistent with previous hypotheses but reveals a highly supported oceanic (Atlantic-Pacific) subdivision within the Acipenser/Huso complex.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">11454768</PMID><DateCreated><Year>2001</Year><Month>07</Month><Day>16</Day></DateCreated><DateCompleted><Year>2001</Year><Month>11</Month><Day>01</Day></DateCompleted><DateRevised><Year>2014</Year><Month>06</Month><Day>13</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0016-6731</ISSN><JournalIssue CitedMedium="Print"><Volume>158</Volume><Issue>3</Issue><PubDate><Year>2001</Year><Month>Jul</Month></PubDate></JournalIssue><Title>Genetics</Title><ISOAbbreviation>Genetics</ISOAbbreviation></Journal><ArticleTitle>Genome duplication events and functional reduction of ploidy levels in sturgeon (Acipenser, Huso and Scaphirhynchus).</ArticleTitle><Pagination><MedlinePgn>1203-15</MedlinePgn></Pagination><Abstract><AbstractText>Sturgeon (order Acipenserformes) provide an ideal taxonomic context for examination of genome duplication events. Multiple levels of ploidy exist among these fish. In a novel microsatellite approach, data from 962 fish from 20 sturgeon species were used for analysis of ploidy in sturgeon. Allele numbers in a sample of individuals were assessed at six microsatellite loci. Species with approximately 120 chromosomes are classified as functional diploid species, species with approximately 250 chromosomes as functional tetraploid species, and with approximately 500 chromosomes as functional octaploids. A molecular phylogeny of the sturgeon was determined on the basis of sequences of the entire mitochondrial cytochrome b gene. By mapping the estimated levels of ploidy on this proposed phylogeny we demonstrate that (I) polyploidization events independently occurred in the acipenseriform radiation; (II) the process of functional genome reduction is nearly finished in species with approximately 120 chromosomes and more active in species with approximately 250 chromosomes and approximately 500 chromosomes; and (III) species with approximately 250 and approximately 500 chromosomes arose more recently than those with approximately 120 chromosomes. These results suggest that gene silencing, chromosomal rearrangements, and transposition events played an important role in the acipenseriform genome formation. Furthermore, this phylogeny is broadly consistent with previous hypotheses but reveals a highly supported oceanic (Atlantic-Pacific) subdivision within the Acipenser/Huso complex.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Ludwig</LastName><ForeName>A</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Institute of Freshwater Ecology and Inland Fisheries, 12561 Berlin, Germany. al@igb-berlin.de</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Belfiore</LastName><ForeName>N M</ForeName><Initials>NM</Initials></Author><Author ValidYN="Y"><LastName>Pitra</LastName><ForeName>C</ForeName><Initials>C</Initials></Author><Author ValidYN="Y"><LastName>Svirsky</LastName><ForeName>V</ForeName><Initials>V</Initials></Author><Author ValidYN="Y"><LastName>Jenneckens</LastName><ForeName>I</ForeName><Initials>I</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal 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