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A comparison of complete mitochondrial genomes of silver carp hypophthalmichthys molitrix and bighead carp hypophthalmichthys nobilis: Implications for their taxonomic relationship and phylogeny

Journal of Fish Biology

By:
, , , , , ,
DOI: 10.1111/j.1095-8649.2009.02258.x

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Abstract

Based upon morphological characters, Silver carp Hypophthalmichthys molitrix and bighead carp Hypophthalmichthys nobilis (or Aristichthys nobilis) have been classified into either the same genus or two distinct genera. Consequently, the taxonomic relationship of the two species at the generic level remains equivocal. This issue is addressed by sequencing complete mitochondrial genomes of H. molitrix and H. nobilis, comparing their mitogenome organization, structure and sequence similarity, and conducting a comprehensive phylogenetic analysis of cyprinid species. As with other cyprinid fishes, the mitogenomes of the two species were structurally conserved, containing 37 genes including 13 protein-coding genes, two ribosomal RNA genes, 22 transfer RNA (tRNAs) genes and a putative control region (D-loop). Sequence similarity between the two mitogenomes varied in different genes or regions, being highest in the tRNA genes (98??8%), lowest in the control region (89??4%) and intermediate in the protein-coding genes (94??2%). Analyses of the sequence comparison and phylogeny using concatenated protein sequences support the view that the two species belong to the genus Hypophthalmichthys. Further studies using nuclear markers and involving more closely related species, and the systematic combination of traditional biology and molecular biology are needed in order to confirm this conclusion. ?? 2009 The Fisheries Society of the British Isles.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A comparison of complete mitochondrial genomes of silver carp hypophthalmichthys molitrix and bighead carp hypophthalmichthys nobilis: Implications for their taxonomic relationship and phylogeny
Series title:
Journal of Fish Biology
DOI:
10.1111/j.1095-8649.2009.02258.x
Volume
74
Issue:
8
Year Published:
2009
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Fish Biology
First page:
1787
Last page:
1803
Number of Pages:
17