| Nr | non-redundant |
| Nt | nucleotide sequences |
| KOG | euKaryotic Ortholog Groups |
| Pfam | Protein family |
| GO | Gene Ontology |
| KEGG | Kyoto Encyclopedia of Genes and Genomes |
| BBH | bi-directional best hit |
| CDS | coding sequences |
| ORF | open reading frame |
| MCL | Markov Cluster algorithm |
| ML | maximum likelihood |
| LRT | likelihood rate test |
| BEB | Bayes Empirical Bayes |
| PSGs | positively selected genes |