Table 3 The number of REB, MREB and PS genes in different avian lineages
| Â | Ancestral lineage | Chicken lineage | Zebra finch lineage |
|---|---|---|---|
Rapidly evolving bird (REB) genes | 419 | 1,148 | 1,202 |
More rapidly evolving genes in birds (MREB) than in other amniotes | 103 | 432 | 1,154 |
Positively selected (PS) bird genes | 259 | 883 | 936 |