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Differential gene expression in relation to mating system in Peromyscine rodents
Jesyka Meléndez-Rosa1,2, Ke Bi2,3, Eileen A Lacey1,2
1Department of Integrative Biology University of California Berkeley California.
Ecology and Evolution
|June 5, 2019
Summary
Mating systems influence gene expression, particularly immune genes. Polygynandrous species showed upregulated MHC Class I genes, suggesting a link between mating behavior, pathogen exposure, and immune activity in mammals.
Area of Science:
- Evolutionary biology
- Immunogenetics
- Animal behavior
Background:
- Behaviors increasing pathogen exposure impact immunoactivity.
- Mating systems offer a model to study pathogen exposure and immune responses.
- Links between polygynandrous mating, pathogen exposure, and immunoactivity are understudied in vertebrates.
Purpose of the Study:
- To investigate the relationship between mating systems and gene expression in mammals.
- To explore how mating behavior influences immune gene activity.
- To examine transcriptomic differences in liver tissue related to mating systems.
Main Methods:
- RNA sequencing (RNAseq) of liver tissue from three sympatric mouse species.
- Comparative analysis of gene expression profiles.
- Differential expression and co-expression analyses focusing on immune-related genes.
Main Results:
- Distinct gene expression patterns were observed among the studied mouse species.
- Gene expression variation was significantly associated with differences in mating systems.
- Upregulation of MHC Class I genes was noted in polygynandrous species, consistent with higher pathogen exposure risks.
Conclusions:
- Mating behavior plays a crucial role in shaping gene expression patterns.
- Transcriptomic analysis provides insights into the immunogenetic correlates of animal behavior.
- Findings highlight the impact of mating systems on immune gene regulation in free-living mammals.
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