Related Experiment Videos
The neutral theory in the genomic era
1Committee on Genetics, University of Chicago, 1101 East 57th Street, Chicago, Illinois 60637, USA. jcfay@lbl.gov
Current Opinion in Genetics & Development
|October 30, 2001
Summary
Scientists use molecular tests to find genes evolving under positive selection. These DNA analyses reveal adaptive evolution insights and test neutral theory on a genomic scale.
Area of Science:
- Molecular evolution
- Population genetics
- Genomics
Background:
- Detecting positive selection at the molecular level is crucial for understanding adaptive evolution.
- Existing tests rely on DNA polymorphism within and divergence between species.
Purpose of the Study:
- To review methods for detecting positive selection.
- To highlight genomic-scale applications of these methods.
- To assess their role in estimating adaptive substitution frequencies and testing neutral theory.
Main Methods:
- Utilizing DNA polymorphism data within species.
- Analyzing DNA divergence data between species.
- Applying these tests on a genomic scale.
Main Results:
- Identification of numerous genes that have evolved under positive selection.
- Gained general insights into the mechanisms of adaptive evolution.
- Provided estimates for the frequency of adaptive substitutions.
- Offered a critical evaluation of the neutral theory of molecular evolution.
Conclusions:
- Molecular tests are effective tools for identifying positive selection.
- Genomic-scale analyses provide robust insights into adaptive evolution.
- These approaches critically test evolutionary theories like the neutral theory.