Use of Genomic Resources to Assess Adaptive Divergence and Introgression in Oaks

Adaptive divergence is widely accepted as a contributor to speciation and the maintenance of species integrity. However, mechanisms leading reproductive isolation, genes involved in adaptive divergence, traits that shape adaptation wild changes climate are still largely unknown. In studying role ecological interactions environment-driven selection, trees have emerged potential model organisms because their longevity large genetic diversity, especially natural habitats. Due recurrent gene flow among with different preferences, oaks arose early 1970s for understanding how can occur face interspecific flow, what we mean by “species” when geographically genomically heterogeneous introgression seems undermine species’ coherence. this review, provide an overview recent research into genomic underpinnings integrity flow. We review analytical tools instrumental better isolation oaks. evidence oak coherent entities, focusing on sympatric populations ongoing discuss hypotheses regarding linking isolation. As evolution drought- freezing-tolerance been key parallel diversification oaks, investigate question whether same or similar set drought stress tolerance across taxa sections. Finally, propose future directions hybridization change.