Fig. 3

Selection analyses identified selection signals in 3 Chinese short fat-tailed sheep breeds. The distributions of Z-transformed average pooled heterozygosity (H _P) as well as the average fixation index between any two breeds for autosomal 200-kb windows (σ, standard deviation; μ, average) are shown on the left. The Z-value distribution plotted along sheep autosomes 1–26 (chromosomes are separated by red and blue coloring) is shown on the right. The dashed horizontal line indicates the cut-off (Z > 4 or Z < -4) used for extracting outliers