Modeling polygenic barriers to gene flow between species
APA
(2024). Modeling polygenic barriers to gene flow between species. SciVideos. https://youtu.be/1ny85Rt1I9s
MLA
Modeling polygenic barriers to gene flow between species. SciVideos, May. 08, 2024, https://youtu.be/1ny85Rt1I9s
BibTex
@misc{ scivideos_ICTS:28545, doi = {}, url = {https://youtu.be/1ny85Rt1I9s}, author = {}, keywords = {}, language = {en}, title = {Modeling polygenic barriers to gene flow between species}, publisher = {}, year = {2024}, month = {may}, note = {ICTS:28545 see, \url{https://scivideos.org/icts-tifr/28545}} }
Abstract
Populations often adapt to spatially heterogeneous environments via substitutions or allele frequency changes at many loci spread across the genome. Subsequent contact between diverged populations can produce unfit hybrids, which inhibits genetic exchange across the genome, thus setting the stage for further divergence and speciation. How such polygenic divergence builds up or is maintained depends on the coupled dynamics of multiple loci under selection, making it challenging to predict. In this talk, I will outline simple theoretical approximations based on effective migration rates that capture how coupling or linkage disequilibria (LD) between loci influences the maintenance of polygenic adaptive divergence. This analysis allow us to clarify how genetic architecture (i.e., the numbers, selective and dominance effects and linkage relationships of selected variants) influences divergence in the face of gene flow and genetic drift. I will conclude my talk with a broader perspective on...