Phylogenetic position of the giant anuran trypanosomes Trypanosoma chattoni, Trypanosoma fallisi, Trypanosoma mega, Trypanosoma neveulemairei, and Trypanosoma ranarum inferred from 18S rRNA gene sequences
Phylogenetic position of the giant anuran trypanosomes Trypanosoma chattoni, Trypanosoma fallisi, Trypanosoma mega, Trypanosoma neveulemairei, and Trypanosoma ranarum inferred from 18S rRNA gene sequences
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DOI：
10.2307/3285450
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发表时间：
2002-06-01
影响因子：
1.3
通讯作者：
Desser, SS
中科院分区：
文献类型：
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作者：
Martin, DS;Wright, ADG;Desser, SS
鞭毛虫内的系统发育关系是通过比较小单位核糖体RNA基因序列推断出来的。其中包括5个新的基因序列。法利斯锥虫（2239髋）。chattoni锥虫（2180 bp）。巨型锥虫（2211 bp）。nevelemairei锥虫（2197 bp）和ranarum锥虫（2203 bp）。树产生了最大parsiniony和距离矩阵方法（最小二乘、邻居连接和最大似然）。支持强大的引导和四重奏难题分析。表明锥虫属单系，可分为两大谱系，即唾液锥虫和非唾液锥虫。非唾液锥虫进一步分为2个谱系。含有鸟类锥虫的。哺乳动物。而爬行动物和其他含有锥虫的鱼类、爬行动物。和无尾类的。在巨型锥虫中，chattoni锥虫与其他所有的anuran锥虫物种都有明显的远亲关系。锥虫病与法利斯锥虫和ranarum锥虫密切相关。而T. nevelemairei和旋转锥虫是姐妹分类群。无尾猿锥虫的分支顺序表明，音蟾锥虫可能是通过宿主从青蛙到蟾蜍的转换而进化的。
Phylogenetic relationships within the kinetoplastid flagellates were inferred from comparisons of small-unit ribosomal RNA gene sequences. These included 5 new gene sequences. Trypanosoma fallisi (2,239 bip). Trypanosoma chattoni (2,180 bp). Trypanosoma mega (2,211 bp). Trypanosoma neveulemairei (2,197 bp), and Trypanosoma ranarum (2,203 bp). Trees produced maximum-parsiniony and distance-matrix methods (least-squares, neighbour-joining, and maximum-likelihood). Supported by strong bootstrap and quartet-puzzle analyses. indicated that the trypanosomes are a monophyletic that divides into 2 major lineages, the salivarian trypanosomes and the nonsalivarian trypanosomes. The nonsalivarian trypanosomes further divide into 2 lineages. I containing trypanosomes of birds. mammals. and reptiles and the other containing trypanosomes of fish, reptiles. and anurans. Among the giant trypanosomes, T. chattoni is clearly shown to be distantly related to all the other anuran rypanosome species. Trypanosoma is closely associated with T. fallisi and T. ranarum. whereas T. neveulemairei and Trypanosoma rotatorium are sister taxa. The branching order of the anuran trypanosomes suggests that sonic toad trypanosomes may have evolved by host switching from frogs to toads.