通过分类单元间距离从加权四元组推断度量树
Inferring metric trees from weighted quartets via an intertaxon distance
摘要：
一个度量系统发育树有关的类群的集合，分别为三个和四个类群的所有子集诱导加权有根三元组和加权四元组。新的分类单元间距离的定义，可以从这些权重计算，并显示完全适合相同的树拓扑结构，但与边缘权重重新缩放的某些因素依赖于相关的分裂大小。这些距离是类似的度量树最近推出的拓扑树，是基于诱导的非加权根三元组和四元组。这里介绍的距离导致新的统计上一致的方法推断一个度量物种树的拓扑基因树的集合下产生的多物种合并模型的不完全谱系排序。模拟提供了对其潜力的深入了解。
英文摘要：
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.
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