The complete mitochondrial genome of Crassostrea hongkongensis from East China Sea indicates species' range may extend northward.
Mol Biol Rep
; 49(2): 1631-1635, 2022 Feb.
Article
em En
| MEDLINE
| ID: mdl-35025030
ABSTRACT
BACKGROUND:
Crassostrea hongkongensis is an important mariculture shellfish with a relatively narrow distribution range. Recently, larger wild oysters were identified as C. hongkongensis from Sanmen bay in East China Sea. No natural distribution had been reported for this species here, and its origin remains unknown. METHODS ANDRESULTS:
We assembled the complete 18,617 bp circular mitochondrial genome of C. hongkongensis from Sanmen bay by next generation sequencing. It included 12 protein-coding genes, 23 tRNAs, and two rRNAs. The A/T content of the mitogenome was higher than its G/C content. Similar values and features were previously found for five other specimens of C. hongkongensis, and were comparable to those of other congeneric species. A phylogenetic analysis based on the 12 protein-coding genes and complete mitochondrial sequence indicated that the six specimens of C. hongkongensis formed a monophyletic group and shared a sister group relationship with C. ariakensis, C. nippona, C. sikamea, C. angulata, C. gigas, and C. iredalei, whereas specimens from the Sanmen bay area clustered later with the five other C. hongkongensis individuals, sharing a sub-clade. The newly sequenced mitogenome had more singleton sites than previously published C. hongkongensis mitogenomes.CONCLUSIONS:
Crassostrea hongkongensis may be a native species, and the species' range extends further to the north than previously known. Our data may therefore contribute to a better understanding of the species diversity and conservation of Crassostrea oysters.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Crassostrea
/
Genoma Mitocondrial
/
Mitocôndrias
Limite:
Animals
País/Região como assunto:
Asia
Idioma:
En
Revista:
Mol Biol Rep
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
China