Metro map of distribution of cultivated grapes collected from 41 countries around the Mediterranean Sea. Country-wise SOM-portraits are linked by lines according to mutual similarity relations (see [3] for details). The map resembles the dissemination routes of cultivated grapes which originated from two areas of primary cultivation in the Caucasus (blue, CG2) and near East (red, CG1) around 11,000 years ago [1]. CG1 distributed towards the east and the west in the following thousand years as indicated (ya…years ago) and mainly constituted the diversity of grapes observed nowadays. The CG-clusters well agree with the regions included in the ellipses.