Phylogenetic position of three Condylostoma species (Protozoa, Ciliophora, Heterotrichea) inferred from the small subunit rRNA gene sequence  

作　　者：Wenbo Guo Weibo Song Khaled A.S. Al-Rasheid Chen Shao Miao Miao Saleh A. Al-Farraj Saleh A. Al-Qurishy Zigui Chen Zhenzhen Yi Shan Gao 

机构地区：[1]Laboratory of Protozoology, Ocean University of China, Minxing Building B, 5 Yushan Road, Qingdao 266003, China [2]Zoology Department, King Saud University, Riyadh 11451, Saudi Arabia

出　　处：《Progress in Natural Science:Materials International》2008年第9期1089-1093,共5页自然科学进展·国际材料（英文版）

基　　金：the National Natural Sci-ence Foundation of China (Grant No. 30670280 and40676076);a grant from the Center of Excellence inBiodiversity, King Saud University

摘　　要：The systematically poorly known ciliate genus Condylostoma was erected by Vincent in 1826.About 10 morphotypes have been reported, but any molecular investigations concerning this group so far are lacking.In this work, the small subunit ribosomal RNA (SS rRNA) gene of three marine Condylostoma species was sequenced, by which the phylogenetic trees were constructed by distance-matrix, maximum parsimony and Bayesian inference methods.The results show that (1) all the trees have similar topologies with high supports;(2) Condylostoma is mostly related to the genus Condylostentor;and (3) three Condylostoma species as well as Condylostentor auriculatus cluster together and form a sister group with other heterotrichs.This is moderately consistent with the assessment of phylo-genetic relationships of Condylostoma-related heterotrichs from the morphological information.The phylogenetic relationship of some other related heterotrichs, Peritromus, Folliculina, Stentor and Blepharisma, has been also discussed.The systematically poorly known ciliate genus Condylostoma was erected by Vincent in 1826. About 10 morphotypes have been reported, but any molecular investigations concerning this group so far are lacking. In this work, the small subunit ribosomal RNA （SS rRNA） gene of three marine Condylostoma species was sequenced, by which the phylogenetic trees were constructed by distancematrix, maximum parsimony and Bayesian inference methods. The results show that （1） all the trees have similar topologies with high supports; （2） Condylostoma is mostly related to the genus Condylostentor; and （3） three Condylostoma species as well as Condylostentor auriculatus cluster together and form a sister group with other heterotrichs. This is moderately consistent with the assessment of phylogenetic relationships of Condylostoma-related heterotrichs from the morphological information. The phylogenetic relationship of some other related heterotrichs, Peritromus, Folliculina, Stentor and Blepharisma, has been also discussed.

关 键 词：Marine ciliates Condylostoma SS rRNA PHYLOGENY Heterotrichs 

分 类 号：Q959.11[生物学—动物学]