Overlap between results from single trait linkage scans with linkage analysis of eigentraits. The y-axis of the top panel represents the number of linkages that fall in each 20 kb non-overlapping regions spread across the genome while along the x-axis the position of genotyped markers at which linkage was estimated is marked. The next two rows of solid circles mark the position of eQTLs detected for eigentraits and ICAtraits, respectively. The position is aligned with the markers on the x-axis of the top plot. The red solid circles represents novel eQTLs while black represents previously described eQTL.