Genomic Evidence of Hybridization Between Two Species in Nicotiana sect. Alatae

This study presents genomic evidence of a natural hybrid zone in diploid Nicotiana sect. Alatae. We show that gene flow between N. alata and N. forgetiana is more extensive than previously considered, and that floral morphology is an unreliable predictor of genetic ancestry. The discovery of cryptic introgression in an allopatric population suggests that N. alata may harbor unrecognized complexity, warranting broader genomic sampling across its range.