The phylogenetic placement of Taenia cestodes that parasitize humans
The phylogenetic placement of Taenia cestodes that parasitize humans
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DOI：
10.2307/3284501
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发表时间：
1998-04-01
影响因子：
1.3
通讯作者：
Alkire, NL
中科院分区：
文献类型：
--
作者：
de Queiroz, A;Alkire, NL
我们利用已公布的细胞色素C氧化酶亚基I(COI)和28S rDNA序列，估计了绦虫属12个种或变种之间的系统发育关系，包括所有3个典型地以人类为最终宿主的物种。使用最大简约法、邻接法和最大似然法对所有数据进行组合分析，得到解析良好的树。无论使用何种分析方法，树都是相似的。大多数具有系统发育信息的特征包含在COI序列中，仅从COI分析获得的树与组合数据树相似。所有的系统发育估计都表明，带绦虫在其历史上曾两次从食肉动物的最终宿主转变为人类的最终宿主。这一结果也得到了使用上述所有3种系统发育估计方法的Bootstrap分析的支持。
We estimated phylogenetic relationships among 12 species or variants of the cestode genus Taenia, including all 3 species that typically use humans as the definitive host, using published sequences of cytochrome c oxidase subunit I (COI) and 28s rDNA. Analyses of all the data combined using maximum parsimony, neighbor-joining, and maximum likelihood methods give well resolved trees. The trees are similar regardless of the analytical method used. Most of the phylogenetically informative characters are contained in the COI sequence, and trees obtained from analyses of COI alone are similar to the combined data trees. All of the phylogeny estimates suggest that Taenia tapeworms have switched from carnivore definitive hosts to human definitive hosts twice in their history. This result is also supported by bootstrap analyses using all 3 of the above methods of phylogeny estimation.