Table 2.
KEGG enrichment analysis of differential metabolite between 2 breeds at the same ages.
| Metabolite | Comparison1 | VIP2 | P-value 3 | FC4 | KEGG pathway5 |
|---|---|---|---|---|---|
| Gamma-glutamyl-L-putrescine | Y30 vs. S30 | 2.30 | <0.01 | 2.02 | Arginine and proline metabolism |
| Y60 vs. S60 | 0.04 | 0.92 | 0.99 | ||
| Y90 vs. S90 | 1.61 | <0.01 | 0.85 | ||
| Y150 vs. S150 | 3.87 | <0.01 | 0.30 | ||
| Y210 vs. S210 | 1.32 | 0.01 | 0.87 | ||
| Y300 vs. S300 | 1.78 | 0.01 | 0.80 |
KEGG = Kyoto Encyclopedia of Genes and Genomes; VIP = variable importance in the projection; FC = fold change.
1
The way of comparison. Pigs of different ages were abbreviated as (breed + age), such as S30 means Shaziling pigs at 30 d of age, Y30 means Yorkshire pigs at 30 d of age.
2
VIP value of OPLS-DA (Orthogonal Partial Least Squares Discrimination Analysis).
3
P-value of t-test. P < 0.05 means a significant difference.
4
Fold change (Y to S) of relative contents between different breeds.
5
The KEGG pathway that differential metabolite participates in.