EsturgeonV1, PubMed, Curation, bibRecord, 000474

Evidence of hexaploid karyotype in shortnose sturgeon.

Identifieur interne : 000474 ( PubMed/Curation ); précédent : 000473; suivant : 000475

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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Le document en format XML

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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="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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<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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<Abstract><AbstractText>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.</AbstractText>
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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)

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Pour générer des pages wiki