论文标题
从加权四重奏中推断出通过及时及时距离的公制树
Inferring metric trees from weighted quartets via an intertaxon distance
论文作者
论文摘要
与分类群集合有关的公制系统发育树可分别为三个和四个分类单元的所有子集引起加权的植根三元组和加权四重奏。定义了可以从这些权重计算出来的新的及时及距离距离，并证明完全适合相同的树拓扑，但是边缘权重由某些因素重新缩放，这些因素取决于相关的拆分尺寸。这些距离是针对基于诱导的未加权的植根三元组和四重奏的拓扑树引入的类似树的类似物。此处介绍的距离导致了从统计上一致的新方法，从多种谱系分类的多种聚合结合模型下产生的拓扑基因树来推断公制的物种树。模拟提供了对其潜力的洞察力。
A metric phylogenetic tree relating a collection of taxa induces weighted rooted triples and weighted quartets for all subsets of three and four taxa, respectively. New intertaxon distances are defined that can be calculated from these weights, and shown to exactly fit the same tree topology, but with edge weights rescaled by certain factors dependent on the associated split size. These distances are analogs for metric trees of similar ones recently introduced for topological trees that are based on induced unweighted rooted triples and quartets. The distances introduced here lead to new statistically consistent methods of inferring a metric species tree from a collection of topological gene trees generated under the multispecies coalescent model of incomplete lineage sorting. Simulations provide insight into their potential.
