We used the PolyPhred program to identify pig cSNPs (SNPs in cDNA) in the assemblies of PEDE ESTs. SNPs in regions of low-quality sequence data or near the end of an assembly were excluded from the candidate SNPs. To avoid errors (mainly caused during reverse transcription), the database contains only those SNPs that occurred on more than 1 read for each particular allele.
SNPs are classified by the effect on coding amino acids and the breed of origin. Clicking on the link by a data entry will list the assemblies belonging to that group.
| In western breeds only | In Meishan only | Between western and Meishan breeds | In both western and Meishan breeds | Total | |
| Synonymous or undetermined | 1379 | 189 | 341 | 110 | 2019 |
| Non-synonymous | 620 | 75 | 88 | 37 | 820 |
| Total | 1999 | 264 | 429 | 147 | 2839 |