Below is an overview of the known genes that may influence a horse's colour, combined with their location on the horse's genome, and the scientific information as it is known or theorized. Note: some colours or white patterns clearly exist, like flaxen and rabicano, but the true means behind their behavior is not yet certain. Such genes are not mentioned here, for the time being. Interested in how these genes work in Horse Reality? Check their respective pages!
| Gene name | Other | Chromosome | Allele | Abbreviation | Research |
|---|---|---|---|---|---|
| Extension | MC1R | 3 | Chestnut | E^e | |
| Extension | MC1R | 3 | Chestnut | E^ea | DNA verified |
| Extension | MC1R | 3 | Black | E^E | |
| Agouti | ASIP | 22 | Black / 'Off' | A^a | DNA tested |
| Agouti | ASIP | 22 | Bay | A^A | Deduced |
| Agouti | ASIP | 22 | Seal brown | A^At | DNA inconclusive |
| Agouti | ASIP | 22 | Wild bay | A+ | Theorised |
| Grey | STX17 | 25 | Grey | G^G | |
| Grey | STX17 | 25 | 'Off' | G^g | |
| Cream | MATP | 21 | Cream | C^CR | |
| Cream | MATP | 21 | Pearl | C^prl | |
| Cream | MATP | 21 | 'Off' | C^n | |
| Dun | 8 | Dun | D^D | ||
| Dun | 8 | 'Off' | D^d | ||
| Iberian dun | Iberian dun | Theorised | |||
| Champagne | SLC36A1 | 14 | Champagne | CH^CH | |
| Champagne | SLC36A1 | 14 | 'Off' | CH^ch | |
| Silver | PMEL17 | 6 | Silver | Z^Z | |
| Silver | PMEL17 | 6 | 'Off' | Z^z | |
| Gene name | Other | Chromosome | Allele | Abbreviation | Research |
|---|---|---|---|---|---|
| Frame | EDNRB | Frame | O^O / O^OLW | ||
| 'Off' | O^o | ||||
| KIT | KIT | 3 | Tobiano | KIT^TO | |
| KIT | KIT | 3 | Sabino-1 | KIT^SB1 | |
| KIT | KIT | 3 | Roan | KIT^RN | |
| KIT | KIT | 3 | White mutations | KIT^W1 t/m 21 | |
| MITF | MITF | 16 | |||
| MITF | MITF | 16 | |||
| MITF | MITF | 16 | |||
| PAX3 | PAX3 | 6 | |||
| PAX3 | PAX3 | 6 | |||
