The complete mitochondrial sequence of Pseudogyrinocheilus prochilus, an endemic species to China and mainly distributed in upper Yangtze River and its tributaries, was obtained by PCR. It was 16,595 bp in length and comprised 37 mitochondrial genes (22 transfer RNA genes, 13 protein-coding genes, 2 ribosomal RNA genes) and 2 non-coding regions. The overall base composition of H-strand was 31.40% A, 26.78% C, 16.18% G, and 25.64% T. Most of the genes are encoded on heavy strand, except for eight tRNA and ND6 genes. The composition and order of mitochondrial gene have no unique characteristics compared to most of other fishes.
Schizothorax lissolabiatus is a widely distributed fish species in Lancang River, Yuanjiang River, Pearl River, Nujiang River in China. The complete mitochondrial genome sequence of S. lissolabiatus from Yuanjiang River (the upper Red River) has been sequenced, which is 16,583 bp in length and contains 22 tRNA genes, 13 protein-coding genes, 2 rRNA genes and 2 main non-coding regions: origin of light-strand replication and control region. Except for eight tRNA and ND6 genes, most of the genes are encoded on the heavy strand. The length of mitochondrial genome, the order, composition and anticodons of all genes are exactly similar to that of S. dolichonema. The phylogenetic tree suggested S. prenanti, S. dolichonema and S. lissolabiatus may have closer affinities than other fish of the genus Schizothorax.
The complete mitochondrial genome sequence of Schizothorax dolichonema has been sequenced, which contains 22 tRNA genes, 13 protein-coding genes, 2 rRNA genes and 2 non-coding regions: origin of light-strand replication and control region, with the total length of 16,583 bp. The gene order and composition are similar to most of other vertebrates. Most of the genes are encoded on heavy strand, except for eight tRNA and ND6 genes. The mitogenome sequence of S. dolichonema would contribute for better understanding of biogeography and evolution of Schizothoracine fishes.
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