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Related Experiment Videos

The tree of eukaryotes.

Patrick J Keeling1, Gertraud Burger, Dion G Durnford

  • 1Department of Botany, University of British Columbia, Vancouver, BC, Canada, V6S 1T4. pkeeling@interchange.ubc.ca

Trends in Ecology & Evolution
|May 17, 2006
PubMed
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Scientists are building the eukaryotic tree of life, revealing major microbial

Area of Science:

  • Evolutionary biology
  • Microbial genomics
  • Phylogenetics

Background:

  • The eukaryotic tree of life is complex, with ongoing efforts to resolve its major lineages.
  • Microbial eukaryotes, including protozoa and algae, form the bulk of eukaryotic diversity.
  • Previous models of eukaryotic relationships have been challenged by new molecular data.

Purpose of the Study:

  • To review recent progress in constructing the eukaryotic tree of life.
  • To synthesize evidence supporting proposed eukaryotic 'supergroups'.
  • To identify remaining knowledge gaps and discuss confounding factors in phylogenetic analyses.

Main Methods:

  • Analysis of single-gene and multigene phylogenetic datasets.
  • Integration of diverse molecular and structural character data.

Related Experiment Videos

  • Comparative genomics to assess evolutionary processes like lateral gene transfer.

    • Main Results:

    • Convergence towards a model with a few large eukaryotic supergroups.
    • Identification of key molecular and morphological evidence supporting these supergroups.
    • Highlighting areas where phylogenetic resolution remains uncertain.

    Conclusions:

    • The eukaryotic tree is increasingly well-resolved, with strong support for major supergroups.
    • Lateral gene transfer and other factors may complicate phylogenetic interpretations.
    • Continued integration of diverse data types is crucial for a comprehensive understanding of eukaryotic evolution.