EsturgeonV1, Main, Merge, bibRecord, 000A61

Evidence of hexaploid karyotype in shortnose sturgeon.

Identifieur interne : 000A61 ( Main/Merge ); précédent : 000A60; suivant : 000A62

Evidence of hexaploid karyotype in shortnose sturgeon.

Auteurs : Francesco Fontana [Italie] ; Leonardo Congiu ; Vincent A. Mudrak ; Joseph M. Quattro ; Theodore I J. Smith ; Kent Ware ; Serge I. Doroshov

Source :

Genome [ 0831-2796 ] ; 2008.

RBID : pubmed:18356945

English descriptors

KwdEn :
- Animals, DNA, Ribosomal (genetics), Fishes (genetics), Gene Duplication, Genome, Karyotyping, Mitosis, Nucleic Acid Hybridization, Polyploidy.
MESH :
- chemical , genetics : DNA, Ribosomal.
- genetics : Fishes.
- Animals, Gene Duplication, Genome, Karyotyping, Mitosis, Nucleic Acid Hybridization, Polyploidy.

Abstract

A karyotype analysis by several staining techniques was carried out on triplicate samples of the shortnose sturgeon, Acipenser brevirostrum. The chromosome number was found to be 2n = 372 +/- 6. A representative karyotype of 374 chromosomes was composed of 178 metacentrics/submetacentrics and 196 telocentrics/acrocentrics and microchromosomes. The signals of fluorescent in situ hybridization (FISH) with a HindIII satellite DNA probe were visible on 14 chromosomes. The signals obtained with a PstI satellite DNA probe appeared on 12 chromosomes. The FISH with a 5S rDNA probe revealed fluorescent signals on 6 chromosomes. These last results, compared with 2 signals in species with about 120 chromosomes and 4 in species with 240, support the hypothesis that A. brevirostrum is a hexaploid species, probably of hybrid origin. Based on these results, we propose a model explaining speciation events occurring in sturgeons by hybridization, genome duplication, and diploidization.

DOI: 10.1139/g07-112
PubMed: 18356945

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pubmed:18356945

Le document en format XML

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<author><name sortKey="Fontana, Francesco" sort="Fontana, Francesco" uniqKey="Fontana F" first="Francesco" last="Fontana">Francesco Fontana</name>
<affiliation wicri:level="1"><nlm:affiliation>Dipartimento di Biologia ed Evoluzione, Universita di Ferrara, Via L. Borsari, 46, 44100 Ferrara, Italy. francesco.fontana@unife.it</nlm:affiliation>
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<wicri:regionArea>Dipartimento di Biologia ed Evoluzione, Universita di Ferrara, Via L. Borsari, 46, 44100 Ferrara</wicri:regionArea>
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<author><name sortKey="Congiu, Leonardo" sort="Congiu, Leonardo" uniqKey="Congiu L" first="Leonardo" last="Congiu">Leonardo Congiu</name>
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<author><name sortKey="Mudrak, Vincent A" sort="Mudrak, Vincent A" uniqKey="Mudrak V" first="Vincent A" last="Mudrak">Vincent A. Mudrak</name>
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<author><name sortKey="Quattro, Joseph M" sort="Quattro, Joseph M" uniqKey="Quattro J" first="Joseph M" last="Quattro">Joseph M. Quattro</name>
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<author><name sortKey="Smith, Theodore I J" sort="Smith, Theodore I J" uniqKey="Smith T" first="Theodore I J" last="Smith">Theodore I J. Smith</name>
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<author><name sortKey="Ware, Kent" sort="Ware, Kent" uniqKey="Ware K" first="Kent" last="Ware">Kent Ware</name>
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<author><name sortKey="Doroshov, Serge I" sort="Doroshov, Serge I" uniqKey="Doroshov S" first="Serge I" last="Doroshov">Serge I. Doroshov</name>
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<author><name sortKey="Smith, Theodore I J" sort="Smith, Theodore I J" uniqKey="Smith T" first="Theodore I J" last="Smith">Theodore I J. Smith</name>
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<author><name sortKey="Ware, Kent" sort="Ware, Kent" uniqKey="Ware K" first="Kent" last="Ware">Kent Ware</name>
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<author><name sortKey="Doroshov, Serge I" sort="Doroshov, Serge I" uniqKey="Doroshov S" first="Serge I" last="Doroshov">Serge I. Doroshov</name>
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<term>Karyotyping</term>
<term>Mitosis</term>
<term>Nucleic Acid Hybridization</term>
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<front><div type="abstract" xml:lang="en">A karyotype analysis by several staining techniques was carried out on triplicate samples of the shortnose sturgeon, Acipenser brevirostrum. The chromosome number was found to be 2n = 372 +/- 6. A representative karyotype of 374 chromosomes was composed of 178 metacentrics/submetacentrics and 196 telocentrics/acrocentrics and microchromosomes. The signals of fluorescent in situ hybridization (FISH) with a HindIII satellite DNA probe were visible on 14 chromosomes. The signals obtained with a PstI satellite DNA probe appeared on 12 chromosomes. The FISH with a 5S rDNA probe revealed fluorescent signals on 6 chromosomes. These last results, compared with 2 signals in species with about 120 chromosomes and 4 in species with 240, support the hypothesis that A. brevirostrum is a hexaploid species, probably of hybrid origin. Based on these results, we propose a model explaining speciation events occurring in sturgeons by hybridization, genome duplication, and diploidization.</div>
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Evidence of hexaploid karyotype in shortnose sturgeon.

Evidence of hexaploid karyotype in shortnose sturgeon.

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki