Fig. 1.

Manhattan plot of PCB 99. Each point corresponds to a SNP passing QC, plotted according to genomic position on the x-axis and the strength of association (−log10 p-value) on the y-axis. The red line indicates the genome wide significance threshold (5×10⁻⁸), while the blue line indicates a threshold of 10⁻⁰⁵. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)