Conflict and resolution between phylogenies inferred from molecular and phenotypic data sets for hagfish, lampreys, and gnathostomes.
Conflict and resolution between phylogenies inferred from molecular and phenotypic data sets for hagfish, lampreys, and gnathostomes.
复制标题
从盲鳗、七鳃鳗和颌动物的分子和表型数据集推断的系统发育之间的冲突和解决。
DOI：
--
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
T. Near
中科院分区：
文献类型：
--
作者：
T. Near
脊椎动物遗传学中最有问题的问题之一是关于八目鳗、七鳃鳗和有颌类之间关系的表型和分子推断之间的不一致。表型特征支持单系的七鳃鳗和颚口类，而几乎所有已发表的分析分子数据集支持单系的八目鳗和七鳃鳗。在这项研究中，我提出的结果相结合的表型和分子数据集，专注于八目鳗，七鳃鳗和有颚类之间的关系的系统发育分析。最大简约性分析的115个表型特征结合4,638 rRNA位点和超过10,000个氨基酸，每个结果在单系的七鳃鳗和有颚类，表明相对较少的表型特征的加入可以改变系统发育推断从大的分子数据集。另一方面，贝叶斯分析的组合数据集支持单系的八目鳗和七鳃鳗，表明基于模型的分析可能容易数据“淹没”，其中较大的分子数据集的系统发育信号压倒了信号中存在的小得多的表型数据集。在参数自举分析中，与盲鳗和七鳃鳗相关的节点以较低的频率被恢复，这表明盲鳗、七鳃鳗和有颚类之间多样化的时间已经为分子数据创造了一个困难的系统发育问题。事实上，除了相对较少的表型特征可以改变从分子数据集获得的圆口纲单系的系统发育推断，以及模拟数据集无法恢复的关键节点，在颅部发育提供的理由，以查看强有力的支持圆口纲单系推断从分子数据集与测量程度的怀疑。
One of the most problematic issues in vertebrate phylogenetics is the disagreement between phenotypic and molecular inferences regarding the relationships among hagfishes, lampreys, and gnathostomes. Phenotypic characters support monophyly of lampreys and gnathostomes, whereas nearly all published analyses of molecular data sets support monophyly of hagfishes and lampreys. In this study I present results of phylogenetic analyses of combined phenotypic and molecular data sets that focus on relationships among hagfishes, lampreys, and gnathostomes. Maximum parsimony analyses of 115 phenotypic characters combined with 4,638 rRNA sites and more than 10,000 amino acids each result in monophyly of lampreys and gnathostomes, demonstrating that the addition of relatively few phenotypic characters can alter phylogenetic inferences from large molecular data sets. On the other hand, Bayesian analyses of the combined data sets support monophyly of hagfish and lampreys, indicating that model-based analyses may be prone to data "swamping," where the phylogenetic signal of the larger molecular data sets overwhelm the signal present in the much smaller phenotypic data set. Nodes that relate hagfish and lampreys were recovered at a low frequency in parametric bootstrapping analyses, indicating that the timing of diversification among hagfishes, lampreys, and gnathostomes has created a difficult phylogenetic problem for molecular data. The fact that addition of relatively few phenotypic characters can alter phylogenetic inferences of cyclostome monophyly obtained from molecular data sets, and the inability of simulated data sets to recover key nodes in the craniate phylogeny provide reasons to view the strong support for cyclostome monophyly inferred from molecular data sets with a measured degree of skepticism.
影响因子：
6.5
作者：
Nylander, JAA;Ronquist, F;Nieves-Aldrey, JL
通讯作者：
Nieves-Aldrey, JL