Fig. 1

Multivariate QTL analysis of the real, 8-variate trait (SBP _i , DBP _i , i = 1, 2, 3, 4) from the family data with 849 individuals and 3.1 million SNPs (after filtering). Manhattan plot (left) and quantile–quantile (Q-Q) plot (right). The horizontal line represents the genome-wide significance level. The total run time on a laptop with an Intel Core i7 2.6 GHz CPU and 16 GB RAM was 78 min