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Updated: Jun 27, 2026
08:57
Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
Published on: August 14, 2018
The impact of reticulate evolution on genome phylogeny
Robert G Beiko1, W Ford Doolittle, Robert L Charlebois
1Faculty of Computer Science, Dalhousie University, Institute for Molecular Bioscience/ARC Centre for Bioinformatics, Brisbane, Australia. beiko@cs.dal.ca
Systematic Biology
|December 17, 2008
Summary
Lateral genetic transfer significantly impacts genome phylogeny accuracy. Even with corrections, conflicting evolutionary signals can obscure the true genome tree, highlighting the need for robust phylogenetic methods.
Area of Science:
- Genomics
- Evolutionary Biology
- Bioinformatics
Background:
- Genome phylogenies reconstruct evolutionary relationships using tree-like models.
- Current methods often fail to account for conflicting signals from lateral genetic transfer (LGT).
- Compromise trees can misrepresent true evolutionary histories due to discordant vertical and horizontal gene flow.
Purpose of the Study:
- To assess the sensitivity of inferred genome phylogenies to lateral genetic transfer.
- To understand how LGT confounds the reconstruction of accurate genome-wide evolutionary trees.
- To evaluate the effectiveness of existing correction methods against LGT.
Main Methods:
- Utilized replicated simulations of genome evolution.
- Introduced various scenarios of lateral genetic transfer into simulated datasets.
- Applied phylogenetic inference methods, including those with corrections for discordant signals.
Main Results:
- Different LGT scenarios demonstrated significant impacts on phylogenetic accuracy.
- The ability to recover the true genome tree was substantially affected by LGT.
- Even corrected methods showed reduced accuracy in the presence of LGT.
Conclusions:
- Lateral genetic transfer poses a major challenge to accurate genome phylogeny reconstruction.
- Phylogenetic methods must be sensitive to and robust against LGT effects.
- Further development of methods is needed to disentangle vertical and horizontal evolutionary signals.
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