Table 1

Descriptive statistics of wool characteristics of Aohan fine wool sheep"

Fig. 1

Correlation analysis of wool fiber diameter and other wool traits |r|≤0.3, weak correlation; 0.3≤|r|≤0.4, moderate correlation; |r|>0.4, strong correlation"

Fig. 2

Population structure diagram of sample PCA The X-axis is PC1 and the Y-axis is PC2"

Fig. 3

Genetic relationship matrix of sample population The heat map of the relationship matrix uses different shades of color to represent the relationship distance between sheep, and light colors represent the more distant relationship"

Fig. 4

LD attenuation analysis The X-axis represents the attenuation distance, and the Y-axis represents r2"

Fig. 5

QQ and Manhattan map of genome-wide association study a. The fiber diameter; b. The natural length; c. The elongation length; d. Elongation rate. In the figure, the horizontal red line represents the genome-wide significance level threshold (P < 4.22×10-5), and the SNP sites above the red line represents the genome-wide significance level. The red line in QQ chart represents the expected value distribution"

Table 2

Significant SNP sites related to 4 wool traits in sheep"

Table 3

Information of candidate genes related to 4 wool traits"

Fig. 6

Results of GO enrichment analysis for 39 candidate genes The Y-axis is enrichment terms, and the X-axis is enrichment score. Terms with larger bubbles contain more differential protein-coding genes, and the color of bubbles varies from green to yellow to red. The smaller the P-value, the greater the significance"

Fig. 7

Schematic diagram of candidate genes participating in a common signaling pathway A. Hair follicle development: cell differentiation; B. Autophagy pathway; C. Adaptive immune response partial pathway. The red part is the candidate genes screened in this study; The blue part is a phospholipid compounds"

Fig. 8

Schematic diagram of candidate genes prediction"