Whole-genome Sequencing Reveals Autooctoploidy in Chinese Sturgeon and Its Evolutionary Trajectories.
Genomics Proteomics Bioinformatics
; 22(1)2024 05 09.
Article
em En
| MEDLINE
| ID: mdl-38862424
ABSTRACT
The order Acipenseriformes, which includes sturgeons and paddlefishes, represents "living fossils" with complex genomes that are good models for understanding whole-genome duplication (WGD) and ploidy evolution in fishes. Here, we sequenced and assembled the first high-quality chromosome-level genome for the complex octoploid Acipenser sinensis (Chinese sturgeon), a critically endangered species that also represents a poorly understood ploidy group in Acipenseriformes. Our results show that A. sinensis is a complex autooctoploid species containing four kinds of octovalents (8n), a hexavalent (6n), two tetravalents (4n), and a divalent (2n). An analysis taking into account delayed rediploidization reveals that the octoploid genome composition of Chinese sturgeon results from two rounds of homologous WGDs, and further provides insights into the timing of its ploidy evolution. This study provides the first octoploid genome resource of Acipenseriformes for understanding ploidy compositions and evolutionary trajectories of polyploid fishes.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Poliploidia
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Genoma
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Evolução Molecular
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Peixes
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Sequenciamento Completo do Genoma
Limite:
Animals
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article