Genetic variability among Trichuris ovis isolates from different hosts in Guangdong Province, China revealed by sequences of three mitochondrial genes

文献类型： 外文期刊

第一作者： Wang, Yan

作者： Wang, Yan;Liu, Guo-Hua;Li, Jia-Yuan;Xu, Min-Jun;Zhou, Dong-Hui;Song, Hui-Qun;Zhu, Xing-Quan;Wang, Yan;Li, Jia-Yuan;Lin, Rui-Qing;Liu, Guo-Hua;Zhu, Xing-Quan;Ye, Yong-Gang;Zhu, Xing-Quan

作者机构：

关键词： Trichuris ovis;genetic variability;mitochondrial DNA;phylogenetic analysis

期刊名称：MITOCHONDRIAL DNA （ 影响因子：0.925； 五年影响因子：0.994 ）

ISSN：

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收录情况： SCI

摘要： This study examined sequence variation in three mitochondrial DNA (mtDNA) regions, namely cytochrome c oxidase subunit 1 (cox1), NADH dehydrogenase subunit 5 (nad5) and cytochrome b (cytb), among Trichuris ovis isolates from different hosts in Guangdong Province, China. A portion of the coxl (pcox1), nad5 (pnad5) and cytb (pcytb) genes was amplified separately from individual whipworms by PCR, and was subjected to sequencing from both directions. The size of the sequences of pcoxl, pnad5 and pcytb was 618, 240 and 464 bp, respectively. Although the intra-specific sequence variations within T. ovis were 0 - 0. 8% for pcoxl, 0 - 0. 8% for pnad5 and 0 - 1. 9% for pcytb, the inter-specific sequence differences among members of the genus Trichuris were significantly higher, being 24.3-26.5% for pcoxl, 33.7-56.4% for pnad5 and 24. 8 - 26. 1% for pcytb, respectively. Phylogenetic analyses using combined sequences of pcoxl, pnad5 and pcytb, with three different computational algorithms (maximum likelihood, maximum parsimony and Bayesian inference), indicated that all of the T. ovis isolates grouped together with high statistical support. These findings demonstrated the existence of intra-specific variation in mtDNA sequences among T ovis isolates from different hosts, and have implications for studying molecular epidemiology and population genetics of T. ovis.

分类号： Q81

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