Complete mitochondrial genome of natural diploid loaches Misgurnus anguillicaudatus from the Taihu Lake.

Misgurnus anguillicaudatus is a highly valued, aquaculture-relevant food fish in East Asian countries. Because of overfishing and environmental pollution, the number of wild Taihu loach has been sharply decreased in these years. In this study, the complete mitochondrial genome of Taihu loach was obtained by PCR. The genome is 16,646 bp in length, including 2 ribosomal RNA genes. Thirteen proteins-coding genes, 22 transfer RNA genes, and a non-coding control region, the gene composition and order of which was similar to most reported from other vertebrates. Sequence analysis showed that the overall base composition is 29.8% for A, 28.2% for T, 25.7% for C, and 16.3% for G. The phylogenetic tree showed that Misgurnus family got together for one branch, which includes Taihu M. anguillicaudatus, and the other loaches had their own branches. Also the mitochondrial genome sequence of M. anguillicaudatus were aligned by BLAST, compared with Cobitinae the sequence similarity could reach >94%, and the similarity to Misgurnus was >99%.