Fig. 2From: Genome-wide association analysis reveal the genetic reasons affect melanin spot accumulation in beak skin of ducksManhattan (left) and QQ plots (right) show the significance of genetic effects on the Melanin spot in duck beak skin by a GWAS. A For melanin spot amount (MSA); B For beak area (BA); and C For melanin spot amount per unit beak area (MSPBA). The GWAS was performed in 223 F2 ducks crossed by Pekin ducks and mallards. The gray line represents the Bonferroni corrected significance threshold (-log10 P = 8.16). The x-axis shows the physical positions for each marker along the chromosomes, and the y-axis shows the -log10 P values for the association testsBack to article page