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28S rDNA MOLECULAR MORPHOLOGY OF THE MAIN BRYOZOAN LINEAGES AND ITS PHYLOGENETIG SIGNIFICANCE
Author(s): 
Pages: 247-255
Year: Issue:  2
Journal: ACTA ZOOTAXONOMICA SINICA

Keyword:  苔藓动物28S rDNA二级结构分子形态学系统发育;
Abstract: 测定了苔藓动物主要代表类群3种苔虫的28S rDNA全序列(3 459~3 613 bp),结合已公布的相关类群的28S rDNA全序列数据,分析了其一级结构特征,并分别绘制了D2、D3和D8区段的二级结构.比较分析结果显示:各类群的全序列总长均超过3 300 bp,GC含量为41.8%~57.7%;D3和D8区段的二级结构保守性较高,D2区差异显著;各区段的长度变化较大,但是,大多都具有相似的主干结构.基于二级结构多变区分子形态学特征的比较基本和基于一级结构的分子系统学结论相吻合,提示它们同样包含着重要的系统发育信息.
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