arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0708.3499q-bio.PEcs.CEcs.DM
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Tree-Child系统发育网络的比较

Comparison of Tree-Child Phylogenetic Networks

Gabriel Cardona, Francesc Rossello, Gabriel Valiente

摘要:

系统发生网络是系统发育树的一种推广,它允许表示非树状的进化事件,如重组、杂交或横向基因转移。在本文中,我们提出并研究了一类新的系统发育网络,称为树子系统发育网络,其中每个不存在的物种都有一些后代通过突变。我们提供了一个内射表示这些网络的自然数向量的多集,他们的路径多重向量,我们用这种表示来定义这个类的距离,并给出一个对齐方法对这些网络。据我们所知,他们分别是第一个真正的距离和第一个比对方法定义在一个有意义的类的系统发育网络严格扩展类的系统发育树。提供了简单的多项式算法,用于从其路径多样性向量重构树子系统发生网络,用于计算两个树子系统发生网络之间的距离,以及用于对齐一对树子系统发生网络,并且它们已经被实现为Perl包和Java applet,并且它们可以在http://bioinfo.uib.es/~recerca/phylonetworks/mudistance上获得

英文摘要:

Phylogenetic networks are a generalization of phylogenetic trees that allow for the representation of non-treelike evolutionary events, like recombination, hybridization, or lateral gene transfer. In this paper, we present and study a new class of phylogenetic networks, called tree-child phylogenetic networks, where every non-extant species has some descendant through mutation. We provide an injective representation of these networks as multisets of vectors of natural numbers, their path multiplicity vectors, and we use this representation to define a distance on this class and to give an alignment method for pairs of these networks. To the best of our knowledge, they are respectively the first true distance and the first alignment method defined on a meaningful class of phylogenetic networks strictly extending the class of phylogenetic trees. Simple, polynomial algorithms for reconstructing a tree-child phylogenetic network from its path multiplicity vectors, for computing the distance between two tree-child phylogenetic networks, and for aligning a pair of tree-child phylogenetic networks, are provided, and they have been implemented as a Perl package and a Java applet, and they are available at http://bioinfo.uib.es/~recerca/phylonetworks/mudistance

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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