Fig. 2

Percentage of shared polymorphism between Lyrata and Arenosa. Only biallelic SNPs were considered, and loci with missing data were ignored. Four groups were evaluated in each analysis: Diploid Arenosa, tetraploid Arenosa, diploid Lyrata and tetraploid Lyrata (A), or the respective population from the introgression zone from south to north only (B-E). a: all tetraploid Lyrata were included, b: only population 137, c: only population 85, d: only population 55, e: only population 37. f: map highlighting the populations in the introgression zone (bold). g: Trends across the introgression zone (south to north) for selected examples are shown and were taken from diagrams B to E. The map was created under the Open Data licence Creative Commons 3.0 Österreich (CC BY 3.0 AT)