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Sexual and temporal dynamics of molecular evolution in C. elegans development
1Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, USA. asher.cutter@ed.ac.uk
Molecular Biology and Evolution
|September 17, 2004
Summary
Genes expressed later in life and during sperm development evolve faster, suggesting relaxed selection after maturity and strong sexual selection on sperm in the nematode Caenorhabditis elegans.
Area of Science:
- Evolutionary biology
- Developmental biology
- Molecular evolution
Background:
- Understanding gene evolution during development and differentiation is crucial but incomplete.
- Specific focus is needed on genes with differential expression across time, tissues, and sexes.
Purpose of the Study:
- Investigate the evolutionary dynamics of genes throughout Caenorhabditis elegans development.
- Analyze genes with differential expression between sexes and gamete types.
Main Methods:
- Utilized genome-wide gene expression time series to classify genes.
- Performed comparative sequence analysis with the related species C. briggsae.
Main Results:
- Genes predominantly expressed after reproductive maturity evolve more rapidly than early developmental genes.
- Transiently expressed embryonic genes evolve faster than other embryonic transcripts.
- Spermatogenesis-related genes show more rapid evolution than other gene classes.
Conclusions:
- Relaxed selection may act on genes expressed post-maturity, aligning with aging models.
- Rapid evolution of sperm genes indicates the influence of sexual selection on sperm development and function.