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Brooks Parsimony Analysis: a valiant failure.

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Summary

Brooks Parsimony Analysis (BPA) is not suitable for comparing host and parasite phylogenies. TreeMap 1.0 can effectively resolve complex host-switching events that befuddle BPA.

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Area of Science:

  • * Evolutionary Biology
  • * Phylogenetics
  • * Coevolutionary Studies

Background:

  • * Comparing host and parasite phylogenies is crucial for understanding coevolutionary dynamics.
  • * Previous studies suggested Brooks Parsimony Analysis (BPA) outperformed TreeMap 1.0 for such comparisons.
  • * The suitability of these methods for diverse phylogenetic scenarios requires re-evaluation.

Purpose of the Study:

  • * To re-evaluate the comparison between TreeMap 1.0 and Brooks Parsinary Analysis (BPA).
  • * To assess the performance of both methods across various host-parasite phylogenetic scenarios.
  • * To determine the most reliable method for analyzing correlated phylogenies.

Main Methods:

  • * Re-analysis of examples used in a prior comparative study of phylogenetic methods.
  • * Testing TreeMap 1.0 and BPA on simulated and real-world host-parasite datasets.
  • * Focus on scenarios involving widespread parasites, sister taxon host-switching, and long-distance host-switching.

Main Results:

  • * The prior study inadequately represented TreeMap 1.0's capabilities, overlooking simple fixes for widespread parasite issues.
  • * BPA struggles with host-switching events among sister taxa and across large distances in host trees.
  • * TreeMap 1.0 effectively and parsimoniously resolves these complex host-switching scenarios.
  • * BPA's solutions require a higher number of ad hoc hypotheses, indicating inefficiency.

Conclusions:

  • * Brooks Parsimony Analysis (BPA) is unsuitable for comparing host and parasite phylogenies due to its limitations.
  • * TreeMap 1.0 demonstrates superior performance in resolving complex coevolutionary histories, particularly host-switching events.
  • * TreeMap 1.0 is the preferred method for accurate phylogenetic analysis of host-parasite relationships.