Skip to main content

Rooting molecular trees: problems and strategies

Buy Article:

$51.00 plus tax (Refund Policy)

Abstract:

In constructing phylogenies from molecular data both the composition of the ingroup and the choice of outgroup can strongly affect the chances of obtaining the correct topology. This is because tree topology and uneven rates of molecular evolution affect the ability of tree‐building algorithms to find the correct tree. Outgroups can be added in one of two ways, either to a single sister clade (preferably the closest) or through addition of single taxa from different clades. On theoretical and empirical grounds the former strategy is shown to be much more beneficial, both in terms of redressing balance and reducing stemminess. For parsimony to perform well some selection of sequence data, through omission or weighting, is also often necessary to reduce levels of homoplasy.

Document Type: Original Article

DOI: https://doi.org/10.1111/j.1095-8312.1994.tb00962.x

Affiliations: Department of Palaeontology, The Natural History Museum, Cromwell Road, London SW7 5BD, U.K.

Publication date: 1994-03-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more