The complete mitochondrial genome of Toxascaris leonina: Comparison with other closely related species and phylogenetic implications

文献类型： 外文期刊

第一作者： Liu, Guo-Hua

作者： Liu, Guo-Hua;Zhou, Dong-Hui;Zhao, Lei;Liang, Jian-Ying;Zhu, Xing-Quan;Liu, Guo-Hua;Zhu, Xing-Quan;Zhao, Lei;Zhu, Xing-Quan;Xiong, Rong-Chuan;Liang, Jian-Ying

作者机构：

关键词： Toxascaris leonina;Mitochondrial genome;Mitochondrial DNA;Phylogenetic analyses

期刊名称：INFECTION GENETICS AND EVOLUTION （ 影响因子：3.342； 五年影响因子：3.188 ）

ISSN： 1567-1348

年卷期： 2014 年 21 卷

页码：

收录情况： SCI

摘要： Adults of Toxascaris leonina (Nematoda: Ascarididae) live in the gastrointestinal tract of both dogs and cats, and cause significant economic losses and potential public health problem worldwide. Although many studies have given insights into this significant pathogen, to date, the complete mitochondrial (mt) genome sequence is still not available for T. leonina. Here, we sequenced the complete mt genome of T. leonina. This AT-rich (71.53%) mt genome (14,310 bp) is circular and consists of 36 genes, including 12 genes for proteins, 2 genes for rRNA and 22 genes for tRNA. All mt genes of T. leonina are transcribed in the same direction. The gene order is the same as those of Ascaris spp. (Ascarididae), Toxocara spp. (Toxocaridae), Anisakis simplex and Contracaecum rudolphii B (Anisakidae), but distinct from that of Ascaridia spp. (Ascaridiidae). Phylogenetic analyses using concatenated amino acid sequences of 12 protein-coding genes by Bayesian inference (BI) showed distinct groups with high statistical support, and our data confirm that T. leonina is a member of the Ascarididae, and that this family is more closely related to the Toxocaridae rather than the Anisakidae within the Ascaridoidea. The determination of mt genome sequences of T. leonina provides novel genetic markers for studies into the systematics, population genetics and epidemiology of this parasite. (C) 2013 Elsevier B. V. All rights reserved.

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