Fig. 4From: Analysis of polygenic selection in purebred and crossbred pig genomes using generation proxy selection mappingQ–Q plots for GPSM P-values from genome-wide association analyses of SNP genotype on AGE. Null SNPs (non-significant) closely followed a uniform distribution, while GPSM significant SNPs deviated from the expected uniform distribution for Duroc (a), Landrace (b), Yorkshire (c), and crossbred (d)Back to article page