Related Experiment Video
Updated: May 26, 2026
12:00
A Practical Guide to Phylogenetics for Nonexperts
Published on: February 5, 2014
Interpreting the evolutionary regression: the interplay between observational and biological errors in phylogenetic
Thomas F Hansen1, Krzysztof Bartoszek
1Department of Biology, Centre for Ecological and Evolutionary Synthesis, University of Oslo, PB 1066, Blindern, N-0316 Oslo, Norway. Thomas.Hansen@bio.uio.no
Systematic Biology
|January 4, 2012
Summary
Biological variation causes phylogenetic correlations in regression residuals. This study details how to estimate and correct for these biases, alongside measurement errors, in evolutionary and allometric regressions.
Area of Science:
- Evolutionary biology
- Comparative biology
- Biostatistics
Background:
- Regression analyses in biology often exhibit residual deviations.
- These deviations frequently display phylogenetic correlations, suggesting underlying biological causes.
- Observational and measurement errors also impact comparative studies using species means.
Purpose of the Study:
- To explore the origins and effects of phylogenetically correlated biological variation in regression.
- To investigate the interplay between biological deviations and measurement errors.
- To provide methods for estimating and correcting biases in evolutionary regressions.
Main Methods:
- Development of general formulas for incorporating measurement error into linear models with correlated data.
- Analysis of bias sources in evolutionary regressions, including phylogenetic inertia and predictor variable errors.
- Evaluation of standard regression models (major axis, reduced major axis) in the presence of biological variation.
Main Results:
- Phylogenetic correlations in regression residuals are common and biologically driven.
- Bias in evolutionary regressions can stem from phylogenetic inertia and errors in predictor variables.
- Existing methods like major axis regression are strongly biased by biological variation and should not be used for evolutionary slopes.
Conclusions:
- Phylogenetic correlations and measurement errors introduce significant biases into evolutionary regression analyses.
- Methods for estimating and correcting these biases in the presence of phylogenetic correlations are presented.
- Alternative regression models are unsuitable for estimating evolutionary or allometric regression slopes due to inherent biases.
Related Concept Videos
02:54Evolutionary Relationships through Genome Comparisons
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
01:23Criticisms of the Evolutionary Perspective
In a study where individuals posing as strangers offered compliments and proposed casual sex to students, the responses differed significantly based on gender. Not a single woman accepted the proposal, while 70% of the men agreed. This outcome provides a useful scenario to explore through the lens of evolutionary psychology and social learning theory, highlighting the diverse perspectives on human sexual behaviors.
Evolutionary psychology provides one explanation for these findings, suggesting...
Evolutionary psychology provides one explanation for these findings, suggesting...
01:28Microbial Phylogeny
Understanding the evolutionary relationships among microorganisms is fundamental to microbial ecology and taxonomy. Phylogenetic trees are essential tools for inferring these relationships, relying primarily on comparative analyses of molecular sequences such as DNA, RNA, or proteins. In microbial studies, these trees typically depict the evolutionary paths of diverse bacterial and archaeal species by mapping genetic differences accumulated over time.Phylogenetic trees are composed of tips,...
02:05Gene Evolution - Fast or Slow?
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
02:05Gene Evolution - Fast or Slow?
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
02:55The Evidence for Evolution
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.