arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.12413q-bio.PEcs.DS
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系统发生网络的最大覆盖子树

Maximum Covering Subtrees for Phylogenetic Networks

Nathan Davidov, Amanda Hernandez, Justin Jian, Patrick McKenna, K. A. Medlin, Roadra Mojumder, Megan Owen, Andrew Quijano, Amanda Rodriguez, Katherine St. John,… 展开作者

Nathan Davidov, Amanda Hernandez, Justin Jian, Patrick McKenna, K. A. Medlin, Roadra Mojumder, Megan Owen, Andrew Quijano, Amanda Rodriguez, Katherine St. John, Katherine Thai, Meliza Uraga

摘要:

基于树的系统发育网络,可以粗略地定义为通过仅在原始树边缘之间添加弧而构建的叶标记网络,具有用于建模进化历史的优雅特性。我们回答了弗朗西斯,森普尔和钢的开放性问题,确定系统发育网络的复杂性是多远,从树为基础的,包括非二进制系统发育网络。我们发现,找到一个系统发育树覆盖的最大数目的节点在系统发育网络可以计算在多项式时间内通过编码成一个最小成本的最大流问题。

英文摘要:

Tree-based phylogenetic networks, which may be roughly defined as leaf-labeled networks built by adding arcs only between the original tree edges, have elegant properties for modeling evolutionary histories. We answer an open question of Francis, Semple, and Steel about the complexity of determining how far a phylogenetic network is from being tree-based, including non-binary phylogenetic networks. We show that finding a phylogenetic tree covering the maximum number of nodes in a phylogenetic network can be be computed in polynomial time via an encoding into a minimum-cost maximum flow problem.

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