The Genome-Wide Effect of Drift and Selection over a Single Generation

The research addresses the longstanding debate over the relative roles of drift and selection in evolution, but specifically over short timescales, which have been largely neglected. The authors argue that previous work often emphasizes major allele frequency changes at a few loci with large selective advantages, while selection likely acts on many loci with small effects. By analyzing genome-wide data from a single generation, the study disentangles the contributions of drift and selection to allele frequency shifts. This approach could refine our understanding of rapid adaptation and the genetic architecture of traits. The findings may have implications for areas such as conservation genetics, breeding, and predicting evolutionary responses to environmental change.