Figure 2

Linkage disequilibrium (LD) across the genome as a function of genomic distance between markers is represented here for Spanish Churra sheep. A) Average LD, measured using two parameters, D’ and r². SNP pairs were stacked according to their physical distance into 14 categories: < 10 kb, 10–20 kb, 20–40 kb, 40–60 kb, 60–100 kb, 200–500 kb, 0.5-1 Mb, 1–2 Mb, 2–5 Mb, 5–10 Mb, 10–20 Mb, 20–50 Mb or > 50 Mb; each point in the graph corresponds to one of these bins. B) Average LD (r²) binning SNPs into 1 Mb-interval categories; half-length LD (r² = 0.033) approximate distance 2.5 Mb.