Zhang Louxin
Department of Mathematics, National University of Singapore , Singapore .
J Comput Biol. 2016 Jul;23(7):553-65. doi: 10.1089/cmb.2015.0228. Epub 2016 May 26.
A large class of phylogenetic networks can be obtained from trees by the addition of horizontal edges between the tree edges. These networks are called tree-based networks. We present a simple necessary and sufficient condition for tree-based networks and prove that a universal tree-based network exists for any number of taxa that contains as its base every phylogenetic tree on the same set of taxa. This answers two problems posted by Francis and Steel recently. A byproduct is a computer program for generating random binary phylogenetic networks under the uniform distribution model.
通过在树边之间添加水平边，可以从树中获得一大类系统发育网络。这些网络被称为基于树的网络。我们给出了基于树的网络的一个简单充要条件，并证明对于任意数量的分类群，存在一个通用的基于树的网络，它以同一组分类群上的每一个系统发育树为基础。这回答了弗朗西斯和斯蒂尔最近提出的两个问题。一个副产品是一个用于在均匀分布模型下生成随机二叉系统发育网络的计算机程序。
