Graphical images of the models derived by a log-linear modelling of data from single nucleotide polymorphism (SNP)44 -SNP49. A p-value threshold of 0.05 was used. The 12 graphs depict models derived from 12 bootstrap samples. A node represents a SNP and an edge denotes an interaction. Plain solid edges represent pairwise interactions; bold solid edges represent three-way interactions; broken edges in bold represent four-way interactions.