Fig. 6

Genome-wide association analysis of the genome-wide recombination rate. The subplots are Manhattan plots of the negative logarithm of the p-value of association against genomic position, broken down by line and sex. Alternating colours correspond to chromosomes 1 to 18. Line 7 was excluded from the analysis because of its small number of dams and sires. The dashed red line shows a conventional genome-wide significance threshold of 5 × 10⁻⁸. The numbers for chromosomes 11, 12 and 17 were removed for legibility