Long-distance dispersal drives the genetic variation and historical demography of Quercus magnoliifolia and Quercus resinosa (Fagaceae) in the Mexican highlands

• DOI: 10.1007/s11295-023-01619-5
• Publication Date: 2023-10-02T05:01:22Z
• Authors: Ana Albarrán-Lara; Maried Ochoa-Zavala; Andres Torres-Mir...; Ivan M. De-la-Cruz; Patricia Dávila-A...; Juan M. Peñaloza-...; Hernando Rodrígue...; Ken Oyama
• Keywords: Introgression; Demographic history; Species distribution

Abstract While hybridization and introgression can have a strong adaptive importance, it impede divergence of species. Quercus magnoliifolia Q. resinosa are two endemic oak species distributed across the Mexican highlands. These diverged ecological morphologically; however, no nuclear genetic differentiation is evident. In this study, we determined mechanisms that shape patterns variation establish role migration in evolutionary history these To do this, Bayesian approaches were used for inference on rates directionality timing between using chloroplast microsatellites. We then integrated distribution models to infer geographic during Last Interglacial, Glacial Maximum, Mid-Holocene time frames. failed distinguishing unique composition each Chloroplast was more congruent with geography than taxonomic status Our study revealed after ( c . 10 Mya) species, high took place at end Pleistocene. Furthermore, past predicted likely been sympatry presumable since Maximum probably expanded geographically towards its current around Mid-Holocene. This expansion supported by testing models, suggesting recent establishment north Trans-Mexican Volcanic Belt. hypothesized diverged, colonization events followed oaks long-distance seed dispersal occurred, explaining present-day diversity. propose remains mainly loci under natural selection, providing evidence “porous” nature boundaries among oaks.