| Involved breeders |
| BSC | Ben Som de Cerff | (NL) |
| ABB | Arista Bee Research Belgium ASBL | (BE) |
| RL | Renaud Lavend'Homme | (BE) |
| MM | Magnus Menges | (DE) |
| LJ | Bertus & Jannie Jochems | (NL) |
| ABR | Foundation Arista Bee Research Bartjan Fernhout | (NL) |
| RK | Ralf Krösche | (DE) |
| PJ | Paul Jungels | (LU) |
| AM | Teeltstation Insel Ameland | (NL) |
| WF | Wietze Faber | (NL) |
| TGZ | Teeltgroep 2000 Cees Haans | (NL) |
| MKK | Pierre de Koning | (NL) |
| CH | Cees Haans | (NL) |
| MKW | Ton Woud | (NL) |
| CH | Cees Haans | (NL) |
| TGZ | Teeltgroep 2000 Cees Haans | (NL) |
| OH | Oswald Hensel | (DE) |