Forces Affecting Nucleotide Composition in Drosophila
Author Information
Author(s): Penelope R Haddrill, Brian Charlesworth
Primary Institution: Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh
Hypothesis
Do differences in GC content of non-coding sequences reflect mutational bias or selection?
Conclusion
Non-coding sequences with high GC contents are associated with stronger selection or biased gene conversion in favor of GC.
Supporting Evidence
- GC content is reduced in regions of low recombination.
- An excess of GC→AT over AT→GC mutations indicates selection or biased gene conversion.
- High GC content sequences show stronger selection/BGC in favor of GC.
Takeaway
This study looks at how the DNA building blocks in fruit flies are influenced by natural selection and mutations, finding that certain sequences are more likely to have a higher amount of GC pairs.
Methodology
Analysis of polymorphism dataset for non-coding sequences on the X chromosome of Drosophila simulans.
Potential Biases
Potential biases associated with ancestral inference.
Limitations
The assumption of equilibrium may be violated in some cases.
Participant Demographics
Sample of Drosophila simulans males from Madagascar.
Statistical Information
P-Value
p<0.001
Confidence Interval
0.04–0.47
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website