Natural Selection and Gene Coexpression in C. elegans
Author Information
Author(s): Jordan I King, Katz Lee S, Denver Dee R, Streelman J Todd
Primary Institution: Georgia Institute of Technology
Hypothesis
Does natural selection influence the evolutionary gene coexpression networks in Caenorhabditis elegans?
Conclusion
Natural selection shapes local patterns of gene coexpression but does not affect the global topology of evolutionary gene coexpression networks in C. elegans.
Supporting Evidence
- The study compared evolutionary gene coexpression networks for C. elegans mutation accumulation lines versus natural isolate populations.
- MA and NI networks showed similar global topological properties but distinct local connectivity.
- Only a small fraction of edges were shared between the MA and NI networks, indicating significant local divergence.
Takeaway
This study found that while natural selection changes how genes work together locally, it doesn't change the overall structure of gene networks in C. elegans.
Methodology
Gene expression levels were measured across lines of C. elegans that diverged from a common ancestor, and coexpression networks were constructed based on these measurements.
Limitations
The study's findings may be influenced by the low number of lines analyzed, which could affect the resolution of the gene expression comparisons.
Participant Demographics
C. elegans lines and populations, specifically mutation accumulation lines and natural isolate populations.
Statistical Information
P-Value
~0.01
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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