Distribution of pig breeds in the median-joint network of haplotypes. The size of the nodes is proportional to the number of individuals with each haplotype; black or white numbers indicate the haplotype numbers and red numbers indicate the number of mutations between the nodes; for clarity, only the haplotypes for which 10 or more individuals carry the haplotype are shown, and the length of the connectors is not proportional to the number of mutations between the nodes; WE = Western Europe (Belgium, France, Germany, Luxemburg, The Netherlands, United Kingdom), CE = Central Europe (Austria, Croatia, Hungary, Poland), SE = Southern Europe (Greece, Italy, Portugal, Spain), NE = Northern Europe (Finland, Sweden), EE = Eastern Europe (Bulgaria); superscript M denotes Mangalica-specific haplotypes.