Fig. 5

Interpolation frequency maps of lineages M and X across Europe and Near East. The interpolation maps were created using the Kriging algorithm showing the spatial frequency distribution of: (a) haplogroup M and (b) haplogroup X, as obtained in our data set and literature listed in the Additional file 2: Table S3. Darker blue shading corresponds to the higher frequencies of the shown haplogroups. The figure was constructed by R.C. and F.R. using the Surfer 9.0 application (Golden Software Inc., Golden, CO, USA)