The Genomic Architecture of Adaptation in Hybrid Zones
Hybrid zones, where distinct species interbreed, serve as natural laboratories for studying the interplay between migration, selection, and adaptation. A new study in western Canada compared replicated hybrid zones in spruce trees, analyzing genome-wide patterns of introgression across both broad latitudinal and narrow elevational gradients. The researchers discovered a complex mosaic of ancestry, with strong genetic differences maintained even over small spatial scales in the steep elevational transect.
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