Myriapod monophyly and relationships among myriapod classes based on nearly complete 28S and 18S rDNA sequences
Myriapod monophyly and relationships among myriapod classes based on nearly complete 28S and 18S rDNA sequences
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DOI：
10.2108/zsj.23.1101
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发表时间：
2006-12-01
影响因子：
0.9
通讯作者：
Zhou, Kai-Ya
中科院分区：
文献类型：
--
作者：
Gai, Yong-Hua;Song, Da-Xiang;Zhou, Kai-Ya
多足类动物在节肢动物系统发育树上占有举足轻重的地位。多足纲的单一性及其内部关系一直是一个难以解决的问题。本研究结合近完整的28S和18S核糖体RNA基因序列（共3826 nt），估计了多足类的系统发育位置和4个多足类之间的系统发育关系。我们的数据集包括6个新的多足类序列和18个其他物种的同源序列，这些序列在GenBank中可用。在6个新的多足动物序列中，1个保足动物和2个合足动物的序列是非常重要的补充，因为它们在过去的分子系统发育研究中很难分类。系统发育树采用最大简约性、最大似然性和贝叶斯分析构建。所有方法均为多足纲的单系性提供了中等到较强的支持。在所有分析条件下，合门与保足目类群强。KH检验否定了Dignatha和Progoneata的传统观点，这里得到的拓扑结构虽然没有得到明显的支持，但却是diploopoda vs （(Symphyla + Pauropoda) + Chilopoda）。
Myriapods play a pivotal position in the arthropod phylogenetic tree. The monophyly of Myriapoda and its internal relationships have been difficult to resolve. This study combined nearly complete 28S and 18S ribosomal RNA gene sequences (3,826 nt in total) to estimate the phylogenetic position of Myriapoda and phylogenetic relationships among four myriapod classes. Our data set consists of six new myriapod sequences and homologous sequences for 18 additional species available in GenBank. Among the six new myriapod sequences, those of the one pauropod and two symphylans are very important additions because they were such difficult taxa to classify in past molecular-phylogenetic studies. Phylogenetic trees were constructed with maximum parsimony, maximum likelihood, and Bayesian analyses. All methods yielded moderate to strong support for the monophyly of Myriapoda. Symphyla grouped strongly with Pauropoda under all analytical conditions. The KH test rejected the traditional view of Dignatha and Progoneata, and the topology obtained here, though not significantly supported, was Diplopoda versus ((Symphyla + Pauropoda) + Chilopoda).