The probability of topological concordance of gene trees and species trees
The probability of topological concordance of gene trees and species trees
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DOI：
10.1006/tpbi.2001.1568
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发表时间：
2002-03-01
影响因子：
1.4
通讯作者：
Rosenberg, NA
中科院分区：
文献类型：
--
作者：
Rosenberg, NA
详细地重新考虑了基因树和物种树的一致性，允许从物种中提取任意大小的样本。阐明了基因树和物种树拓扑结构的一致性，即如果基因树产生的“折叠基因树”与物种树具有相同的拓扑结构，则称该基因树与物种树在拓扑上是一致的。术语特殊树被引入来指其树在拓扑上与物种树一致的基因。对于给定的三种拓扑，给出了三种可能折叠的基因树拓扑中每一种的概率，以及在N.Takahata(1989)，Genetics 122,957-966意义上的单系一致性和一致性的概率。增加样本大小可以增加拓扑一致性的概率，但拓扑一致性概率的增加量是有限的。给出了建议的样本量，超过该样本量的概率只能最小限度地增加。讨论了这些结果对系统发育和物种形成的分子研究的意义。(C)2002年埃尔塞维尔科学公司(美国)。
The concordance of gene trees and species trees is reconsidered in detail, allowing for samples of arbitrary size to be taken from the species. A sense of concordance for gene tree and species tree topologies is clarified, such that if the "collapsed gene tree" produced by a gene tree has the same topology as the species tree, the gene tree is said to be topologically concordant with the species tree. The term speciodendric is introduced to refer to genes whose trees are topologically concordant with species trees. For a given three-species topology, probabilities of each of the three possible collapsed gene tree topologies are given, as are probabilities of monophyletic concordance and concordance in the sense of N. Takahata (1989), Genetics 122, 957-966. Increasing the sample size is found to increase the probability of topological concordance, but a limit exists on how much the topological concordance probability can be increased. Suggested sample sizes beyond which this probability can be increased only minimally are given. The results are discussed in terms of implications for molecular studies of phylogenetics and speciation. (C) 2002 Elsevier Science (USA).