Metrics for Phylogenetic Networks I: Generalizations of the Robinson-Foulds Metric

  • Authors:
  • Gabriel Cardona;Mercè Llabrés;Francesc Rosselló;Gabriel Valiente

  • Affiliations:
  • University of the Balearic Islands, Palma de Mallorca;University of the Balearic Islands, Palma de Mallorca;University of the Balearic Islands, Palma de Mallorca;Technical University of Catalonia, Barcelona

  • Venue:
  • IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB)
  • Year:
  • 2009

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Abstract

The assessment of phylogenetic network reconstruction methods requires the ability to compare phylogenetic networks. This is the first in a series of papers devoted to the analysis and comparison of metrics for tree-child time consistent phylogenetic networks on the same set of taxa. In this paper, we study three metrics that have already been introduced in the literature: the Robinson-Foulds distance, the tripartitions distance and the $\mu$-distance. They generalize to networks the classical Robinson-Foulds or partition distance for phylogenetic trees. We analyze the behavior of these metrics by studying their least and largest values and when they achieve them. As a by-product of this study, we obtain tight bounds on the size of a tree-child time consistent phylogenetic network.