The second highest chromosome count among vertebrates is observed in cultured sturgeon and is associated with genome plasticity.
Identifieur interne : 000021 ( Main/Exploration ); précédent : 000020; suivant : 000022The second highest chromosome count among vertebrates is observed in cultured sturgeon and is associated with genome plasticity.
Auteurs : Miloš Havelka [République tchèque] ; Dmytro Bytyutskyy [République tchèque] ; Radka Symonová [Autriche] ; Petr Ráb [République tchèque] ; Martin Flajšhans [République tchèque]Source :
- Genetics, selection, evolution : GSE [ 1297-9686 ] ; 2016.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : DNA.
- genetics : Cell Nucleus, Chromosomes, Fertility, Fishes, Meiosis, Microsatellite Repeats.
- Animals, Female, Genome, Genotype, Hybridization, Genetic, Male, Ploidies.
Abstract
One of the five basal actinopterygian lineages, the Chondrostei, including sturgeon, shovelnose, and paddlefish (Order Acipenseriformes) show extraordinary ploidy diversity associated with three rounds of lineage-specific whole-genome duplication, resulting in three levels of ploidy in sturgeon. Recently, incidence of spontaneous polyploidization has been reported among cultured sturgeon and it could have serious negative implications for the economics of sturgeon farming. We report the occurrence of seven spontaneous heptaploid (7n) Siberian sturgeon Acipenser baerii, which is a functional tetraploid species (4n) with ~245 chromosomes. Our aims were to assess ploidy level and chromosome number of the analysed specimens and to identify the possible mechanism that underlies the occurrence of spontaneous additional chromosome sets in their genome.
DOI: 10.1186/s12711-016-0194-0
PubMed: 26867760
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en">One of the five basal actinopterygian lineages, the Chondrostei, including sturgeon, shovelnose, and paddlefish (Order Acipenseriformes) show extraordinary ploidy diversity associated with three rounds of lineage-specific whole-genome duplication, resulting in three levels of ploidy in sturgeon. Recently, incidence of spontaneous polyploidization has been reported among cultured sturgeon and it could have serious negative implications for the economics of sturgeon farming. We report the occurrence of seven spontaneous heptaploid (7n) Siberian sturgeon Acipenser baerii, which is a functional tetraploid species (4n) with ~245 chromosomes. Our aims were to assess ploidy level and chromosome number of the analysed specimens and to identify the possible mechanism that underlies the occurrence of spontaneous additional chromosome sets in their genome.</div>
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