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Varieties with a similar appearance
Bolko
| Characters compared | Value |
| Maturity: | Very late |
| Foliage cover: | Good |
| Flower colour: | White |
| Flower frequency: | Frequent |
| Berries: | Frequent |
| Pollen fertility: | Sterile |
| Tuber skin colour: | White to yellow |
| Primary tuber flesh colour: | Light yellow |
| Tuber shape: | Oval to round |
| Tuber eye depth: | Shallow to medium |
| Tuber skin texture: | Smooth |
| Variety | Characters matched | Sources |
| Cara | 9/11 | 5 |
| Bolko | 9/11 | 3 |
| Escort | 8/11 | 7 |
| Ostara | 8/11 | 6 |
| Ackersegen | 8/11 | 5 |
| Aula | 8/11 | 4 |
| Mila | 8/11 | 3 |
| Elsa | 8/11 | 2 |
| Colina | 8/11 | 2 |
| Vulkano | 8/11 | 2 |
| Karpina | 8/11 | 2 |
| Karmona | 8/11 | 2 |
| Monalisa | 7/11 | 7 |
| Primura | 7/11 | 6 |
| Russet Burbank | 7/11 | 5 |
| Sirtema | 7/11 | 5 |
| Berber | 7/11 | 4 |
| Maritta | 7/11 | 4 |
| Producent | 7/11 | 4 |
| Sante | 7/11 | 4 |
| Minerva | 7/11 | 4 |
| Record | 7/11 | 4 |
| Gigant | 7/11 | 3 |
| Aranyalma | 7/11 | 3 |
| Lerche | 7/11 | 3 |
| Uran | 7/11 | 3 |
| Fresco | 7/11 | 3 |
| Ausonia | 7/11 | 3 |
| Golden Wonder | 7/11 | 3 |
| Hankkijan Tuomas | 7/11 | 3 |
| Prima | 7/11 | 3 |
| Fox | 7/11 | 3 |
| Bzura | 7/11 | 3 |
| Eba | 7/11 | 3 |
| Reda | 7/11 | 3 |
| Adretta | 7/11 | 3 |
| Carina | 7/11 | 3 |
| Pentland Ivory | 7/11 | 3 |
| Superior | 7/11 | 3 |
| Flora (1939) | 7/11 | 2 |
| Alka | 7/11 | 2 |
| Exita | 7/11 | 2 |
| Somogyi Korai | 7/11 | 2 |
| Manuela | 7/11 | 2 |
| Franziska | 7/11 | 2 |
| Kora (1975) | 7/11 | 2 |
| Kolektyw | 7/11 | 2 |
| Notec | 7/11 | 2 |
| Amsel | 7/11 | 2 |
| Tarpan | 7/11 | 2 |
| Porta | 7/11 | 2 |
| Temp | 7/11 | 2 |
| Auralia | 7/11 | 2 |
| Laverta | 7/11 | 2 |
| Ronda (1974) | 7/11 | 2 |
| Norma (1980) | 7/11 | 2 |
| Arkula | 7/11 | 2 |
| Atleet | 7/11 | 2 |
| Turbo | 7/11 | 2 |
| Gusto | 7/11 | 2 |
| Mariella | 7/11 | 2 |
| Orlik (1963) | 7/11 | 2 |
| Antares | 7/11 | 2 |
| Orlik (1989) | 7/11 | 2 |
| Ina | 7/11 | 2 |
| Liwia | 7/11 | 2 |
| Gatcinsky | 7/11 | 2 |
| Passat | 7/11 | 2 |
| Artus | 7/11 | 1 |
| Komsomolets 20 | 7/11 | 1 |
| Gunosa | 7/11 | 1 |
| Erntedank | 7/11 | 1 |
| We 58 7 49 | 7/11 | 1 |
| Rema | 7/11 | 1 |
| Amex | 7/11 | 1 |
| Koral | 7/11 | 1 |
| Lipsi | 7/11 | 1 |
| Ma 65 38 1 | 7/11 | 1 |
| Liu | 7/11 | 1 |
| Dorisa | 7/11 | 1 |
| Linda (1936) | 7/11 | 1 |
| Edelgard | 7/11 | 1 |
| Meliora | 7/11 | 1 |
| Hyva | 7/11 | 1 |
| Wiga | 7/11 | 1 |
| Fortuna (1950) | 7/11 | 1 |
| Mansour (1984) | 7/11 | 1 |
| Gluckskind | 7/11 | 1 |
| Anco | 7/11 | 1 |
