Interchromosomal linkage disequilibrium between LG2 and LG12.

<p>(A) Heat map of interchromosomal linkage disequilibrium between LG2 and LG12, axis labels represent linkage map positions (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0106380#pone.0106380-Borza1" target="_blank">[34]</a>), note that several SNPs share a common map location. Plots of population differentiation (<i>F</i>_ST) on the left and the bottom compare divergence between N and S types, in both the west (black line) and east Atlantic (grey line). Two main regions of ILD between previously identified adaptive genomic regions are highlighted by white rectangles. (B) Histogram of D’ values for all interchromosomal pairs of SNPs.