A molecular phylogeny of Hexapoda
A molecular phylogeny of Hexapoda
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DOI：
10.3897/asp.64.e31642
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发表时间：
2006-10
期刊：
影响因子：
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通讯作者：
K. Kjer;F. Carle;Jessica R. Litman;J. Ware
中科院分区：
文献类型：
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作者：
K. Kjer;F. Carle;Jessica R. Litman;J. Ware
我们提出了一种超矩阵方法来研究昆虫纲的系统发育，该方法源于第二届德累斯顿昆虫系统发育会议(2005)上的一次演讲。数据包括28S(D1-D8)片段和18S、组蛋白(H3)、EF-1α、COI、COII、12S和16S以及中间tRNA的完整序列，以及170个形态性状。将核糖体RNA序列与二级结构手动比对。对组合数据进行了两个独立的贝叶斯似然分析，以及加权简约分析。还探索了分区的数据集。预期的六足目、昆虫纲、双翅目、翼手目、新翅目、双翅目、副翅目和内翅目等分支都得到了持续的恢复。然而，来自独立数据集的相互矛盾的假设，以及缺乏组合超矩阵的定量支持，表明对非全变态新翅目之间的关系的阐明还远远没有解决。不同谱系间的替换率异质性、中间类群的缺失、近乎同步的分化、有缺陷的系统发育模型和核苷酸组成偏差被讨论为未解决的序间关系的可能原因。探讨了该数据集传递信息的能力、其固有的局限性以及系统主义者在解释数据方面的作用和责任
We present a supermatrix approach to the phylogeny of Insecta that stemmed from a talk given at the 2nd Dresden Meeting on Insect Phylogeny (2005). The data included a fragment of the 28S (D1–D8) and complete sequences for the 18S, histone (H3), EF-1α, COI, COII, the 12S and 16S plus the intervening tRNA, and 170 morphological characters. Ribosomal RNA sequences were manually aligned to secondary structure. Two separate Bayesian likelihood analyses were performed, as well as a weighted parsimony analysis, on combined data. Partitioned datasets were also explored. Expected clades like Hexapoda, Insecta, Dicondylia, Pterygota, Neoptera, Dictyoptera, Paraneoptera, and Endopterygota were consistently recovered. However, conflicting hypotheses from independent datasets, as well as a lack of quantitative support from the combined supermatrix, suggest that the elucidation of relationships between non-holometabolous neopteran orders is far from resolved. Substitution rate heterogeneity among lineages, missing intermediate taxa, near simultaneous divergences, flawed phylogenetic models and nucleotide compositional bias are discussed as possible causes for unresolved interordinal relationships. The capacity of this dataset to convey information, its inherent limitations, and the role and responsibility of the systematist in interpreting data are explored