通过核糖体18S rDNA探讨柳珊瑚分子系统发育关系  

Phylogenetic Relationships with the Gorgonian ( Cndaria: Anthozoa: Octocorallia ) Based on 18S rDNA Sequences

作　　者：李秀保[1] 黄晖[1] 张俊彬[1] 董志军[1] 黄良民[1] 

机构地区：[1]中科院南海海洋研究所

出　　处：《海洋通报》2006年第6期10-19,共10页Marine Science Bulletin

基　　金：中科院分类区系特别支持项目(编号:YQ020202);广东省重大项目(编号:2003A3050101)

摘　　要：通过对南海3种柳珊瑚的18SrDNA序列的测序,结合Genebank中搜索到的其他26种柳珊瑚的18SrDNA序列,构建了NJ和MP系统发育树,结果表明柳珊瑚可分为两个类群,系统树清楚表明了钙轴珊瑚类群的系统发育关系,但未能很好反映全轴珊瑚类群的系统发育关系。钙轴珊瑚类群的系统发育关系较为清晰,其中枝鳃珊瑚科(Dendrobrachiidae)、红珊瑚科(Coralliidae)和拟柳珊瑚科(Paragorgiidae)的遗传关系非常紧密,三爪珊瑚科(Briareidae)、鞭柳珊瑚科(Ellisellidae)和Erythropodiumcaribaeorum分类地位还待商榷,需要选取更多的样品构建系统树才能弄清楚它们准确的分类地位。全轴珊瑚类群的系统关系非常混乱,可见18SrDNA并不能提供有效的遗传信息,这就需要寻求其他遗传标记来解决全轴珊瑚类群的系统关系。Three gorgonians were sequenced. We used the 3 sequences with another 26 sequences downloaded from Genebank to construct genealogical relationships. The phylogenetic trees showed that gorgonians could be divided into two clades. The phylogeny of Calcaxonia clade was clear and showed great similarity, but the Holaxonia clade was ambiguous, indicating the 18S rRNA gene was uninformative to classify the Holaxonia clade. The species of Dendrobrachiidae was clearly associated with the species of the Coralliidae and Paragorgiidae belonging to Calcaxonia clade while the taxonomy of Ellisellidae, Briareidae and Erythropodium caribaeorumwere unclear. It is essential to search for new molecular marker to deal with the taxonomy of Holaxonia clade and species from Family Ellisellidae and Family Briareidae.

关 键 词：柳珊瑚 18S RDNA 分子系统关系 

分 类 号：Q178.53[生物学—水生生物学]