Fig. 1

Unrooted phylogenetic tree showing genetic relatedness of the 37 traditional chicken breeds. The phylogeny tree was constructed using the Neighbor-Joining method with random input orders and the pairwise 1-IBS-distance matrix. Large fowls and bantam counterparts of each breed are reported with the same colour. The name of each breed is indicated in the figure with, in some cases, the use of an arrow. For abbreviations, refer to Table 1