Allelic distribution in the cultivated S. lycopersicum groups. A: Distribution of private alleles in the predefined S. lycopersicum groups. The Venn diagram illustrates the number of alleles that are exclusive to the various combinations among the four pre-defined groups of cultivated tomatoes. B: Number of rare alleles in the pre-defined groups of cultivated tomatoes. For each bar, the height of the colored segments represent the number of alleles that are absent (blue), with a frequency lower than 0.01 (red) or lower than 0.05 (green). See Additional file 5: Table S5 for the name of the alleles.