Fig. 4: Linkage disequilibrium (LD) heat maps.

LD across dsx (gray shading) and flanking 100 kb for P. polytes (a), P. rumanzovia (b), P. memnon (c), and P. aegeus (d). Standard color scheme: D’ < 1, LOD < 2 (white); D’ = 1, LOD < 2 (blue); D’ ≤ 1, LOD ≥ 2 (pink and red). Dashed line in a shows the inverted region. E1–6 indicate the dsx exons.