Fig. 4

a Combination analysis graph of sample clustering tree and histogram based on KEGG enrichment at different domestication stages and b microbial correlation network diagram (Note: the node pie chart represents different OTUs, and different color blocks on the pie chart represent the abundance of samples in the OTU classification. Red lines indicate positive correlations; green lines indicate negative correlations; significant correlations (p < 0.05) are shown by dotted lines; highly significant correlations (p < 0.01) are shown by solid lines; correlations greater than 0.8 are indicated by thick lines and correlations below 0.8 are indicated by thin lines. c Heatmap of genus level species abundance at different domestication stages