Geographical distribution of the 128 L. infantum strains studied. Strains are represented by coloured circles that correspond to their population assignment at K = 4 by STRUCTURE analysis (Figure 2A); Population 1-green, population 2-yellow, population 3-blue and population 4-red circles. The circles representing the Turkish strain isolated from Black Sea region (Çorum prefecture) and all strains from Croatia are colored according to their subpopulation assignment as in Figure 4. L. infantum MON-98 strains are indicated with an asterisk. Strains included for comparison from France, Spain and Portugal (Table 1) are not shown.