Fig. 6From: Analysis of polygenic selection in purebred and crossbred pig genomes using generation proxy selection mappingDistribution of SNP effects for null and GPSM significant markers. For Duroc (a), Landrace (b), Yorkshire (c), and crossbred (d) pigs, null SNPs (non-significant) were normally distributed with a mean near zero, while GPSM significant SNPs followed a bimodal distribution with central values for each peak located above and below zeroBack to article page