Global intensity patterns discriminate between classical inbred, genetically divergent and hybrid samples. Hybridization intensity for all SNP probes for A) C57BL6/J, a classical inbred strain and also the mouse reference genome, C) CAST/EiJ, an inbred strain derived from a wild-caught M. m. castaneus mouse, and B) a (C57BL/6JxCAST/EiJ)F1 hybrid. The x-axis represents the absolute value of the contrast (A-B) and the y-axis is the mean intensity. The density of probe sets is represented by a color gradient from purple (low) to green (high). VINOs are seen in the lower-left corner of each plot.