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Updated: Jul 2, 2026

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

Phylogenetic signal, evolutionary process, and rate.

Liam J Revell¹, Luke J Harmon, David C Collar

¹Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts 02138, USA. lrevell@fas.harvard.edu

Systematic Biology

|August 19, 2008

Summary

This summary is machine-generated.

Phylogenetic signal measures trait dependence due to species relationships. This study shows evolutionary rate does not reliably predict phylogenetic signal, cautioning against interpreting evolutionary process from signal alone.

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Area of Science:

Evolutionary biology
Phylogenetics
Quantitative genetics

Background:

Phylogenetic signal quantifies trait value dependence among related species.
This pattern is often misinterpreted as directly reflecting evolutionary rates or processes.
Previous assumptions linked high rates to low signal and low rates to high signal.

Purpose of the Study:

To clarify the relationship between phylogenetic signal, evolutionary rate, and evolutionary process.
To investigate these relationships using individual-based numerical simulations.
To provide evidence-based recommendations for interpreting phylogenetic signal.

Main Methods:

Individual-based numerical simulations on stochastic phylogenetic trees.
Analysis of quantitative trait evolution under various models.
Statistical assessment of the relationship between signal, rate, and process.

Main Results:

Under homogeneous rate genetic drift, evolutionary rate and phylogenetic signal are unrelated.
Complex relationships exist between signal, rate, and process under models like functional constraint and fluctuating selection.
Estimates of phylogenetic signal do not reliably indicate evolutionary process or rate.

Conclusions:

Interpreting evolutionary process or rate solely from phylogenetic signal estimates is not recommended.
The relationship between phylogenetic signal and evolutionary dynamics is nuanced and model-dependent.
Further research is needed to disentangle the complex interplay of factors influencing phylogenetic signal.