Fig. 1 . TCS network of 38 Citrullus spp. haplotypes. Circle size is proportional to haplotype frequency. Taxon names are abbreviated with two or three letters. Clv: C. lanatus subsp.vulgaris ; Cll: C. lanatus subsp. lanatus ; Cm:C. mucosospermus ; Cam: C. amarus ; and Cco: C. colocynthis . The numbers are arbitrary haplotype ID numbers (see Table S2), and the colors indicate geographical distribution: Africa (green), Asia (yellow); Europe (red), and North America (blue).