Table 1.
Breeds alphabetically listed with numbers (n) of horses per breed and genetic cluster assignment (1–6).
| Breed Denomination | n | n with EHM | Cluster Assignment |
|---|---|---|---|
| American Paint Horse | 1 | 1 | 1 |
| American Quarter Horse (AQH) | 46 | 14 | 1 |
| Appaloosa | 1 | 0 | 1 |
| Standardbred | 2 | 1 | 1 |
| Thoroughbred | 3 | 2 | 1 |
| Warmblood (all studbooks) (WB) | 296 | 87 | 1 |
| F1 crossbred within cluster | 1 | 0 | 1 |
| Arabian | 16 | 3 | 2 |
| Criollo | 1 | 0 | 3 |
| Lusitano | 2 | 1 | 3 |
| Mestizio | 1 | 0 | 3 |
| Pura raza espanola (PRE) | 10 | 1 | 3 |
| Draft horse | 5 | 0 | 4 |
| Friesian | 3 | 1 | 4 |
| Haflinger | 16 | 3 | 4 |
| F1 crossbred within cluster | 1 | 0 | 4 |
| Connemara | 5 | 1 | 5 |
| New Forest | 1 | 0 | 5 |
| Welsh pony (classes A–C) | 23 | 1 | 5 |
| Fjord | 32 | 14 | 6 |
| Gotland pony | 1 | 0 | 6 |
| Huzul (Carpathian) | 2 | 0 | 6 |
| Icelandic | 8 | 2 | 6 |
| Konik | 1 | 0 | 6 |
| Shetland pony | 24 | 1 | 6 |
| Total assigned to clusters | 502 | 133 | |
| Duelmener | 1 | 1 | unassigned |
| Lewitzer | 1 | 1 | unassigned |
| Lipizzaner | 1 | 0 | unassigned |
| Pinto | 1 | 0 | unassigned |
| Robust pony (unknown pedigree; combined based on size, built & appearance) | 20 | 0 | unassigned |
| Sport pony (unknown pedigree; combined based on built & use (dressage, show jumping) | 40 | 9 | unassigned |
| F1 crossbreeds between different cluster | 15 | 6 | unassigned |
| Pedigree unknown horses | 8 | 0 | unassigned |
| Total | 589 | 150 |