基于18Sr DNA序列对单尾虫属(粘体门,双壳目)的系统学研究  

Phylogenetic Study on GenusUnicauda(Myxozoa,Bivalvulida) based on 18S rDNA sequences

作　　者：李楠楠[1] 赵元莙[1] 唐发辉[1] 索栋[1] 邱烈[2] 

机构地区：[1]动物生物学重庆市市级重点实验室重庆师范大学,重庆400047 [2]重庆医药高等专科学校,重庆400047

出　　处：《内江师范学院学报》2012年第12期38-42,69,共6页Journal of Neijiang Normal University

基　　金：国家自然科学基金项目(30570329);重庆市科技创新建设项目(CSTC;2010CA1010);重庆市教委项目(KJ092701);重庆师范大学博士启动基金(11XLB025)联合资助

摘　　要：采用18S rDNA序列为基础的系统分析方法,对采自嘉陵江磁器口江段的黄颡单尾虫Unicauda pelteobagrus Ma,1998进行了分子系统学研究,首次给出了黄颡单尾虫的SSU rDNA序列信息.同时基于18SrDNA数据、遗传距离和系统树特征讨论了尾单尾虫Unicauda caudatus和黄颡单尾虫的系统关系.结果表明,尾单尾虫与尾碘泡虫的系统关系较近,而与黄颡单尾虫系统关系较远,不支持将尾单尾孢虫和黄颡单尾虫同置于单尾虫属中,并对单尾虫属的有效性提出质疑.The molecular phylogeny for Unicauda pelteobagrus Ma, 1998, isolated from Pelteobagrus fulvidraco in Ciqikou area of Jialing River, Chongqing China, was studied based on 18S rDNA sequences. The present work also first supplied the 18S rDNA sequences information of Unicauda pelteobagrus Ma, 1998. At the same time, the phylogenic relationship between U. pelteobagrus and U. caudatus was discussed inferred from the 18S rDNA sequences, genetic distance and the characteristics of the phylogenetic tree. The result indicates that U. caudatus has much closer phylogenetic relationship with Myxobolus caudatus and far away from U. pelteobagrus, which did not support the viewpoint that putting U. caudatus and U. pelteobagrus into the same genus Unicauda. The present study also revealed that the validity of genus Unicauda was questionable.

关 键 词：黄颡单尾虫 尾单尾虫 粘孢子虫 18S RDNA 

分 类 号：Q959[生物学—动物学]