Figure 2

Examples of F ratio profiles in the different Hohenheim crosses shown for chromosomes 1, 7 and X. The solid line indicates the P = 0.01, the dashed line the P = 0.05 genome-wide thresholds, and the dotted line the P = 0.05 chromosome-wide threshold for F ratio values; traits are defined in Table 2; positions of markers are given in Kosambi centimorgan (cM) on the linkage maps of Hohenheim crosses; results for SSCX were obtained from female animals; markers are described in Additional file 1; data sets for the two sexes are shown with the averaged linkage map distances whereas for SSCX the female map distances are used; M: Meishan; P: Pietrain; W: European wild boar.