Correlation of genotypes illustrating non-syntenic associations for 102 strains. This sample from the complete correlation matrix of the BXN set illustrates both the expected syntenic correlations (the large red diagonal region extending down to the right) and several unexpected regions of high non-syntenic correlation between different chromosomes. Red regions are linked with positive correlation between 0.20 and 1.0 (p < 0.05). Darker blue regions are linked with negative correlation of between -0.20 and -0.40 (p < 0.05). Beige and light-blue regions are regions with intermediate correlation that are not statistically different from zero with 100 degrees of freedom. For example, the region of chromosome 1 near D1Mit135 (labeled D1M 135 in this table) is linked positively to the proximal part of chromosome 19 and negatively to the proximal part of chromosome 2. The full data table is available online in several formats as Additional data files and at .