Fig. 1

Identification of positional candidate genes for the skin fat phenotype in ducks. A Manhattan plot of association results from genome-wide association analysis. Y axis shows −log₁₀ (P-value) of the association result for each SNP. Each SNP is indicated by a colored dot. SNPs are plotted based on the reference duck genome chromosome (x-axis). The horizontal solid line is the threshold for the Bonferroni level of significance (P < 8.72E−08). The horizontal dashed line is the threshold for the Bonferroni level of significance (P < 1.74E−06). B Haplotype block at linkage disequilibrium (LD) with the skin fat based on 5 candidate variations. The diagram above the haplotype block indicates genes around candidate variations. C The skin fat weight (SFW) of the ducks with different Genotypes. The WT represents the genotype with identical alleles (-T-C-A-A-C) at corresponding chromosomal loci, the Homozygous represents the genotype with identical alleles (-A-T-C–C-G-) at corresponding chromosomal loci, and the Heterozygous represents the genotype with two different alleles (-T-C-A-A-C and -A-T-C–C-G-) at the given locus. The level of significance was presented as ^*P < 0.05, ^**P < 0.01, ^***P < 0.001, ^****P < 0.0001