The triples distance for rooted bifurcating phylogenetic trees
The triples distance for rooted bifurcating phylogenetic trees
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DOI：
10.2307/2413567
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发表时间：
1996-09-01
影响因子：
6.5
通讯作者：
Qian, CL
中科院分区：
文献类型：
--
作者：
Critchlow, DE;Pearl, DK;Qian, CL
我们研究了三元组距离作为两个根分叉系统发育树之间距离的度量。三元组距离计算两个树中不同的三个分类群的子树数量。给出了该距离测度抽样分布的均值和方差的精确表达式。同时，在树分布的标记不变模型下证明了正态逼近。该理论应用于使用三元组距离作为检验零假设的统计量，即两棵树的相似性可以用独立的随机结构来解释。在一个例子中，比较了描述相同七种绿藻游动孢子绿藻的两个系统发生：一个基于形态特征的系统发生和一个基于核糖体RNA基因序列数据的系统发生。
We investigated the triples distance as a measure of the distance between two rooted bifurcating phylogenetic trees. The triples distance counts the number of subtrees of three taxa that are different in the two trees. Exact expressions are given for the mean and variance of the sampling distribution of this distance measure. Also, a normal approximation is proved under the class of label-invariant models on the distribution of trees. The theory is applied to the usage of the triples distance as a statistic for testing the null hypothesis that the similarities in two trees can be explained by independent random structures. In an example, two phylogenies that describe the same seven species of chloroccalean zoosporic green algae are compared: one phylogeny based on morphological characteristics and one based on ribosomal RNA gene sequence data.