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September 10, 2025Botanical SciencesOpen Access

Landscape genomics of the contact zone between the Mexican red oaks Quercus affinis and Quercus laurina: genetic diversity, hybridization and local adaptation

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Analysis of genetic diversity, hybridization patterns, and local adaptation in two oak species reveals insights into gene flow.

Hybridization significantly increased genetic diversity in quercus affinis and quercus laurina populations across their contact zone.
Genetic analyses revealed a moderate interspecific differentiation (FST = 0.137), with populations exhibiting high levels of admixture.
Models fitted to genetic clines indicated that adaptive SNPs were predominantly associated with stress response genes in the oak species.
Understanding these hybridization patterns can enhance insights into evolutionary potential and ecological resilience of oak populations.

Rodríguez‐Gómez et al. (2025) studied this question.

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