Wang Xue, Cao Liang, Zhang E
a Institute of Hydrobiology, Chinese Academy of Sciences , Wuhan , Hubei Province , PR China.
b University of Chinese Academy of Sciences , Beijing 100049 , PR China.
Mitochondrial DNA A DNA Mapp Seq Anal. 2017 Mar;28(2):171-172. doi: 10.3109/19401736.2015.1115495. Epub 2015 Dec 28.
The complete mitochondrial genome of the typical cave-dwelling nemacheilid loach species, Triplophysa xiangxiensis, was sequenced. The mitogenome of this blind fish, with 16 598 bp in length, composed of 13 protein-coding, 2 rRNA and 22 tRNA genes, and 2 non-coding regions (D-loop and O). Its phylogenetic position within the Nemacheilidae was estimated. Phylogenetic tree inferred based on the complete mitogenome indicated that T. xiangxiensis was sister to T. rosa; both clustered with all other analyzed congeneric species to form the sister group of sampled species of Barbatula. The pairwise genetic distance between these two blind species was much lower than those between both and all other congeneric species. A further study on the taxonomic status of both within Triplophysa or the Nemacheilidae is warranted.
对典型洞穴盲鳅类物种湘西高原鳅（Triplophysa xiangxiensis）的完整线粒体基因组进行了测序。这种盲鱼的线粒体基因组长度为16598 bp，由13个蛋白质编码基因、2个rRNA基因、22个tRNA基因和2个非编码区（D-loop和O）组成。估计了它在条鳅科中的系统发育位置。基于完整线粒体基因组推断的系统发育树表明，湘西高原鳅是玫瑰高原鳅的姐妹种；二者与所有其他分析过的同属物种聚在一起，形成了拟腹吸鳅属采样物种的姐妹群。这两种盲鱼之间的成对遗传距离远低于它们与所有其他同属物种之间的遗传距离。有必要对二者在高原鳅属或条鳅科内的分类地位作进一步研究。
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