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Improving the Additive Tree Representation of a Dissimilarity Matrix Using Reticulations

  • Vladimir Makarenkov
  • Pierre Legendre
Part of the Studies in Classification, Data Analysis, and Knowledge Organization book series (STUDIES CLASS)

Abstract

This paper addresses the problem of approximating a dissimilarity matrix by means of a reticulogram. A reticulogram represents an evolutionary structure in which the objects may be related in a non-unique way to a common ancestor. Dendrograms and additive (phylogenetic) trees are particular cases of reticulograms. The reticulogram is obtained by adding edges (reticulations) to an additive tree, gradually improving the approximation of the dissimilarity matrix. We constructed a reticulogram representing the evolution of 12 primates. The reticulogram not only improved the data approximation provided by the phylogenetic tree, but also depicted the homoplasy contained in the data, which cannot be expressed bv a tree topology. The algorithm for reconstructing reticulograms is part of the T-Rex software package, available at URL <http://www.fas.umontreal.ca/BIOL/legendre>.

Keywords

Edge Length World Monkey Lateral Gene Transfer Dissimilarity Matrix Reticulate Evolution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin · Heidelberg 2000

Authors and Affiliations

  • Vladimir Makarenkov
    • 1
    • 2
  • Pierre Legendre
    • 3
  1. 1.Département de sciences biologiquesUniversité de MontréalMontréalCanada
  2. 2.Institute of Control SciencesMoscowRussia
  3. 3.Département de sciences biologiquesUniversité de MontréalMontréalCanada

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