Abstract
The hybrid loach of Misgurnus anguillicaudatus (female) and Paramisgurnus dabryanus ssp. (male) has the desirable trait of growth performance. Recently, farming scale of this hybrid has been gradually increased in Asia, suggesting a promise of a new variety for loach. In this study, the complete mitochondrial genome of the hybrid loach was obtained by PCR. The genome is 16,646 bp in length, including two ribosomal RNA genes. Thirteen proteins-coding genes, 22 transfer RNA genes, and a non-coding control region, the gene composition and order of were similar to most reported from other vertebrates. Sequence analysis showed that the overall base composition is 29.8% for A, 28.3% for T, 25.6% for C, and 16.3% for G. The phylogenetic tree showed that Misgurnus family got together for one branch, which includes this hybrid loach, and the other loaches had their own branches. Also the mitochondrial genome sequences of the hybrid loach were aligned by BLAST, compared with Cobitidae the sequence similarity could reach >95%, and the similarity to Misgurnus was >99%. The hybrid loach follows the matrilineal inheritance.
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