The complete mitochondrial genome of Rhynchocypris oxycephalus (Teleostei: Cyprinidae) and its phylogenetic implications
文献类型： 外文期刊
作者： Zhang, Zhichao 1 ; Cheng, Qiqun 1 ; Ge, Yushuang 1 ;
作者机构： 1.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Minist Agr & Rural Affairs, Key Lab Ocean & Polar Fisheries, Shanghai 200090, Peoples R China
2.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi, Jiangsu, Peoples R China
3.Shanghai Ocean Univ, Coll Marine Sci, Shanghai, Peoples R China
关键词： conservation genetics; DNA barcoding; mitochondrial genome; phylogenetic analysis; Rhynchocypris oxycephalus
期刊名称：ECOLOGY AND EVOLUTION （ 影响因子：2.912； 五年影响因子：3.271 ）
ISSN： 2045-7758
年卷期： 2019 年 9 卷 13 期
页码：
收录情况： SCI
摘要： Rhynchocypris oxycephalus (Teleostei: Cyprinidae) is a typical small cold water fish, which is distributed widely and mainly inhabits in East Asia. Here, we sequenced and determined the complete mitochondrial genome of R. oxycephalus and studied its phylogenetic implication. R. oxycephalus mitogenome is 16,609 bp in length (GenBank accession no.: MH885043), and it contains 13 protein-coding genes (PCGs), two rRNA genes, 22 tRNA genes, and two noncoding regions (the control region and the putative origin of light-strand replication). 12 PCGs started with ATG, while COI used GTG as the start codon. The secondary structure of tRNA-Ser (AGN) lacks the dihydrouracil (DHU) arm. The control region is 943bp in length, with a termination-associated sequence, six conserved sequence blocks (CSB-1, CSB-2, CSB-3, CSB-D, CSB-E, CSB-F), and a repetitive sequence. Phylogenetic analysis was performed with maximum likelihood and Bayesian methods based on the concatenated nucleotide sequence of 13 PCGs and the complete sequence without control region, and the result revealed that the relationship between R. oxycephalus and R. percnurus is closest, while the relationship with R. kumgangensis is farthest. The genus Rhynchocypris is revealed as a polyphyletic group, and R. kumgangensis had distant relationship with other Rhynchocypris species. In addition, COI and ND2 genes are considered as the fittest DNA barcoding gene in genus Rhynchocypris. This work provides additional molecular information for studying R. oxycephalus conservation genetics and evolutionary relationships.
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