Phylogenomics Reshuffles the Eukaryotic Supergroups
Author Information
Author(s): Fabien Burki, Kamran Shalchian-Tabrizi, Marianne Minge, Åsmund Skjæveland, Sergey I. Nikolaev, Kjetill S. Jakobsen, Jan Pawlowski
Primary Institution: University of Geneva
Hypothesis
What is the phylogenetic position of Rhizaria within the eukaryotic tree?
Conclusion
The study provides strong evidence for a new supergroup 'SAR' that includes Rhizaria, stramenopiles, and alveolates, suggesting a closer evolutionary relationship among these groups than previously thought.
Supporting Evidence
- The study analyzed 29908 amino acid positions from 49 eukaryotic species.
- It confirmed the monophyly of Rhizaria and its close relationship with stramenopiles and alveolates.
- The proposed 'SAR' supergroup includes a large diversity of unicellular eukaryotes.
Takeaway
Scientists found that a group of tiny organisms called Rhizaria is more closely related to two other groups than they thought, which helps us understand how different life forms are connected.
Methodology
The study used expressed sequence tags (ESTs) and a phylogenomic approach to analyze relationships among 49 eukaryotic species.
Potential Biases
Potential biases may arise from the selection of taxa and genes used in the analysis.
Limitations
The study's conclusions are based on a limited dataset and may not capture all eukaryotic diversity.
Statistical Information
P-Value
4e-008
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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