Figure 1

Manhattan plots of raw and corrected p -values from the genome-wide association (CMH test) for whole genome and ECA 18. (a) Manhattan plot of raw p-values from the genome-wide association analysis (CMH test) with flat and National Hunt-bred horses combined. (b) Manhattan plot of empirical p-values, calculated after 1000 permutations (c) empirical p-values for ECA 18 plotted against SNP position on the chromosome (Mb). The 5% genome-wide significance threshold is shown as a red line.