Figure 2. Manhattan plot of observed −log10 p-values from the GWAS of cortical Aβ load.
More than six million SNPs were tested for association to global cortical Aβ burden under an additive genetic model and applying age, gender, and diagnosis as covariates. Genome-wide significant associations (exceeding the threshold represented by the red line) were identified on chromosome 19 within APOE and its neighboring genes and on chromosome 3 at the BCHE locus. Suggestive associations (exceeding the threshold represented by the blue line) were identified on five additional chromosomes. Annotations are provided for genome-wide significant associations and for the top three suggestive associations.