Geheimrat Dr. Oldenburg
German apple cultivar
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'Geheimrat Dr. Oldenburg' is a German apple cultivar. It was created in 1897 at the Höheren Lehranstalt für Obstbau of Geisenheim in the Rheingau, in Hesse in central Germany.[1] It may also be known as 'Geheimrat Doktor Oldenburg', 'Geheimrat Oldenburg', or simply 'Oldenburg'. It is a quite different apple from the older Russian cultivar 'Duchess of Oldenburg', also sometimes known simply as 'Oldenburg'.
| 'Geheimrat Dr. Oldenburg' | |
|---|---|
| Genus | Malus |
| Species | Malus pumila |
| Hybrid parentage | 'Minister von Hammerstein' × 'Baumanns Renette' |
| Cultivar | 'Geheimrat Dr. Oldenburg' |
| Origin | Germany, 1897 |


History
The cultivar was created in 1897 at the Höheren Lehranstalt für Obstbau of Geisenheim in the Rheingau, in Hesse in central Germany. It is documented as a hybrid of 'Minister von Hammerstein' and 'Baumanns Renette';[1][2] A single-nucleotide polymorphism study has found it be a hybrid of 'Alexander' and 'Ananas Reinette'.[3]: 11
Hybrids
Cultivars that descend from 'Geheimrat Dr. Oldenburg' include: 'Alkmene' (Geheimrat Dr. Oldenburg × Cox's Orange Pippin); 'Apollo' (Cox's Orange Pippin × Geheimrat Dr. Oldenburg); 'Clivia' (Geheimrat Dr. Oldenburg × Cox's Orange Pippin);[4]: 539 ; 'Elektra' (Cox's Orange Pippin x Geheimrat Doktor Oldenburg); 'Roba' (Geheimrat Dr. Oldenburg x unknown);[2] and possibly 'Dukat' (Geheimrat Dr. Oldenburg × Cox's Orange Pippin).[4]: 538