Rooting with Multiple Outgroups: Consensus Versus Parsimony

@article{Barriel1998RootingWM,
  title={Rooting with Multiple Outgroups: Consensus Versus Parsimony},
  author={V{\'e}ronique Barriel and Pascal Tassy},
  journal={Cladistics},
  year={1998},
  volume={14}
}
Using outgroup(s) is the most frequent method to root trees. Rooting through unconstrained simultaneous analysis of several outgroups is a favoured option because it serves as a test of the supposed monophyly of the ingroup. When contradiction occurs among the characters of the outgroups, the branching pattern of basal nodes of the rooted tree is dependent on the order of the outgroups listed in the data matrix, that is, on the prime outgroup (even in the case of exhaustive search). Different… Expand
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