Fig. 3

Levels of recombination and linkage disequilibrium (LD) within the F. ovina PgiC1 sequence. a Population recombination rate (ρ) across PgiC1. The heavy line represents the mean value of ρ, while the thin lines represent the upper and lower 95% HPD (highest posterior density) interval bounds for the posterior distribution of ρ. b LD matrix for PgiC1. The level of LD is measured by the pairwise correlation coefficient r ² values [42] for all the polymorphic nucleotide sites (except for one that segregates into more than two nucleotides [34]). Shades of grey indicate the r ² values, ranging from r ² = 0 (white) to r ² = 1 (black). The proportional spacing of the polymorphic sites, which is scaled according to an earlier published PgiC1 gene sequence (GenBank accession number HQ616103), is indicated by black vertical lines on a white horizontal bar (shown above the LD matrix)