Is the Felsenstein zone a fly trap?
Is the Felsenstein zone a fly trap?
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DOI：
10.1093/sysbio/46.1.69
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发表时间：
1997-03
影响因子：
6.5
通讯作者：
J. Huelsenbeck
中科院分区：
文献类型：
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作者：
J. Huelsenbeck
尽管近二十年来，长枝吸引（long-branch attraction），即由于系统误差而导致的长谱系在系统发育中的不正确分组，已被确定为系统发育分析中的潜在误差来源，但并没有这种现象的实证例子。在这里，我概述了几个标准识别长枝吸引力，并将这些标准应用于13种昆虫的18 S核糖体DNA（rDNA）序列数据。简约和最小进化与p距离组的两个最长的分支在一起（那些导致Strepsiptera和Diptera）。模拟研究表明，长树枝足够长，以吸引。当假设一棵树，其中Strepsiptera和双翅目是分开的，许多数据集模拟该树（使用该树的原始数据的参数估计），简约分析的模拟数据一致的组Strepsiptera和双翅目。18 S rDNA序列的分析使用的方法是不太敏感的问题，长分支的吸引力估计树，其中长分支是分开的。
Although long-branch attraction, the incorrect grouping of long lineages in a phylogeny because of systematic error, has been identified as a potential source of error in phylogenetic analysis for almost two decades, no empirical examples of the phenomenon exist. Here, I outline several criteria for identifying long-branch attraction and apply these criteria to 18S ribosomal DNA (rDNA) sequence data for 13 insects. Parsimony and minimum evolution with p distances group the two longest branches together (those leading to Strepsiptera and Diptera). Simulation studies show that the long branches are long enough to attract. When a tree is assumed in which Strepsiptera and Diptera are separated and many data sets are simulated for that tree (using the parameter estimates for that tree for the original data), parsimony analysis of the simulated data consistently groups Strepsiptera and Diptera. Analyses of the 18S rDNA sequences using methods that are less sensitive to the problem of long-branch attraction estimate trees in which the long branches are separate.