Novel Graphical Analyses of Runs of Homozygosity among Species and Livestock Breeds

Figure 2

Examples of the investigated patterns. (a) A simultaneous increase (or decrease) in the number of SNPs in a ROH across all populations, as this pattern could possibly involve genes fundamental for the two species analysed (chromosome 3); (b) few populations showing an opposite pattern compared to the others, as this could comprise genes specific for those populations (chromosome 7); (c) different patterns between dairy and meat breeds, as this could possibly concern regions under human-induced directional selection (chromosome 2); (d) different patterns between bison and domestic cattle breeds, as this pattern may be related to traits important for survival in the wild (chromosome 3); (e) a single domestic breed differentiating from the others, as this could relate to specific characteristics of that breed (chromosome 14); (f) a long region with a high percentage of ROH, as this could be associated with recent selective events (chromosome 20); (g) a short region with opposite trend within a longer homogeneous region, to investigate what could have caused such an abrupt change in variability levels (chromosome 7).

(a)

(b)

(c)

(d)

(e)

(f)

(g)