The median-joining network based on 951 bp of the mitochondrial D-Loop representing 272 horses within 87 haplotypes. Mutational hot spots were taking into account according to Cieslak et al.  and Jansen et al. . The haplogroups were named as defined by Achilli et al. . Each population was shown by color and the proportions of different populations for each haplotype were shown. Population abbreviations are found in Table 1. Reference sample X79547 was labeled with a star.