Phylogenetic relationships within the class Spirotrichea (Ciliophora) inferred from small subunit rRNA gene sequences
Phylogenetic relationships within the class Spirotrichea (Ciliophora) inferred from small subunit rRNA gene sequences
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DOI：
10.1006/mpev.2001.0997
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发表时间：
2001-10-01
影响因子：
4.1
通讯作者：
Schlegel, M
中科院分区：
文献类型：
--
作者：
Bernhard, D;Stechmann, A;Schlegel, M
对游仆虫科5个种和尖毛虫科8个种的小亚基rDNA进行了测序，以获得更详细的螺旋毛虫属（纤毛门）系统发育关系的图像。各种树重建算法产生了几乎相同的拓扑结构。所有游仆虫科与其他螺毛类都被一个深深的裂缝分开。此外，海洋单胞虫属和淡水游仆虫属之间存在较大的遗传距离，所用方法之间的差异仅发生在尖鞭虫科内部。所有的树木都支持刺尾虫亚科的单系性，而尖毛虫亚科的单系性则不支持。然而，分子数据支持的形态学和个体发育的证据表明，18个额腹横向纤毛的模式演变的茎尖的Oxytrichidae和修改了几次独立。我们的研究结果也与分类修订：分离Sterkiella nova Oxytricha和Tetmemena pustulata Stylonychia。(C)北京：科学出版社.
The small subunit rDNAs of five species belonging to the Euplotidae and eight species of the Oxytrichidae were sequenced to obtain a more detailed picture of the phylogenetic relationships within the Spirotrichea (Ciliophora). Various tree reconstruction algorhythms yielded nearly identical topologies. All Euplotidae were separated from the other Spirotrichea by a deep split. Further, a large genetic distance between the marine genus Moneuplotes and the freshwater species of Euplotoides was found. Differences between the methods used occurred only within the Oxytrichidae. Whereas the monophyly of the Stylonychinae was supported in all trees, the monophyly of the Oxytrichinae was not. However, the molecular data support the morphological and ontogenetic evidence that the pattern of 18 frontal-ventral-transversal cirri evolved in the stemline of the Oxytrichidae and was modified several times independently. Our results are also in agreement with taxonomic revisions: the separation of both Sterkiella nova from Oxytricha and Tetmemena pustulata from Stylonychia. (C) 2001 Academic Press.