Tracing the origin of Betonica officinalis in Sweden: RADseq suggests long-term persistence in southern (Scanian) populations
The biogeographical origin of Betonica officinalis L. in Sweden has long been debated as to whether its populations represent natural postglacial relicts or human introductions. Using RADseq data from 42 individuals across 35 sites in 14 European countries, we analysed 9,598 SNPs to map genetic structure and infer relationships among regions. We found strong differentiation between western and cen
