Table 3. Amino-acids variants observed at the MC1R locus in 51 Z. borbonicus individuals representing the four Réunion morphs and nine Z. mauritianus individuals.
| Variant 1 | Variant 2 | Variant 3 | Variant 4 | |
| Position of the mutation | C134→T134 | G514→A514 | C673→T673 | C683→T683 |
| Amino-acid change | Ala45→Val45 | Val172→ Ile172 | Pro225→ Ser225 | Ala228→ Val228 |
| Brown (lowlands) | Not found | Heterozygous | Not found | Not found |
| Brown (highlands) | Not found | Heterozygous | Not found | Not found |
| Grey | Not found | Heterozygous | Not found | Not found |
| Grey-headed brown | Heterozygous | Not found | Not found | Not found |
| Grey-headed brown-naped brown | Not found | Heterozygous | Heterozygous | Not found |
| Mauritius | Not found | Not found | Not found | Heterozygous |
For each variant the corresponding nucleotide substitution is indicated, with its state (heterozygous or homozygous) in each morph and species studied here. Sequences were numbered in reference to the chicken genome (Genbank accession number: AY220305).