Topological properties of phylogenetic trees in evolutionary models

Topological properties of phylogenetic trees in evolutionary models
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进化模型中系统发育树的拓扑特性

DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
S. Manrubia
S. Manrubia
中科院分区：
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文献类型：
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作者：
M. Stich;S. Manrubia

文献摘要

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摘要进化过程对形状的影响程度 系统发育树是一个重要的悬而未决的问题。分析了 小树似乎能察觉到不平凡的不对称，这种不对称通常是 归因于物种形成率之间存在相关性。许多 用于构建系统发育树的模型有一种算法 很少有生物上的根基。在这篇文章中，我们 分析生成的系统发育树的拓扑性质 通过不同的进化模型(RNA序列和 具有遗传和突变的简单模型)，并与 已知的不相关模型所产生的树是向后的 结合型，特别注意大树。我们的结果 证明进化参数如突变率或 选择压力对材料的伸缩行为影响较小 树木，虽然系统发育的大小强烈影响测量 标度指数。在统计误差内，拓扑学 由进化模型生成的系统发育的特性是 与在平衡的、不相关的树中测量的数据兼容。
AbstractThe extent to which evolutionary processes affect the shape of phylogenetic trees is an important open question. Analyses of small trees seem to detect non-trivial asymmetries which are usually ascribed to the presence of correlations in speciation rates. Many models used to construct phylogenetic trees have an algorithmic nature and are rarely biologically grounded. In this article, we analyze the topological properties of phylogenetic trees generated by different evolutionary models (populations of RNA sequences and a simple model with inheritance and mutation) and compare them with the trees produced by known uncorrelated models as the backward coalescent, paying special attention to large trees. Our results demonstrate that evolutionary parameters as mutation rate or selection pressure have a weak influence on the scaling behavior of the trees, while the size of phylogenies strongly affects measured scaling exponents. Within statistical errors, the topological properties of phylogenies generated by evolutionary models are compatible with those measured in balanced, uncorrelated trees.