| Name | Accession number | Synonym | Species | Habit | Locality |
|---|---|---|---|---|---|
| ORDAMIRAMAR-3 | K-56730 | TR.AE | W | ITA | |
| ORDEAL | K-64537 | TR.AE | W | GBR | |
| ORDEK | CDWS-91-M-41[1281][3692]; | TR.DR | S | MEX | |
| ORDENES-REGADIO | TR.AE | ESP | |||
| ORDYNATKA,BLR | K-37928 | TR.AE | S | BLR | |
| ORDYNATKA,POL | K-26560; K-37822 | TR.AE | S | POL | |
| ORDYNSKAYA | LUTESCENS-1268[205]; | TR.AE | S | RUS:Novosibirsk | |
| OREA | S | ||||
| OREGAL | D-94798[000]; | TR.DR | ITA | ||
| OREGON | K-40564 | ORANGE-WHITE-LAMMAS[145][851][1765]; | TR.AE | W | CHL |
| OREGON-CLUB | CI-4257 | CLUB-WHEAT[39]; LOUISIANA-WHEAT[39]; BIG-CLUB[39][1110]; | TR.CO | S | USA:Oregon |
| OREGON-GOLDEN-CHAFF | FOISY[39][1110]; | TR.AE | S | USA:Oregon | |
| OREGON-GOLDMINE | GOLDCOIN[39][1110]; | TR.AE | W | USA | |
| OREGON-RED | HARVEST-QUEEN[39][1110]; | TR.AE | W | USA:Kansas | |
| OREGON-RED-CHAFF,TR.AE | FOISY[39][1110]; POOLE[39]; | TR.AE | S | USA:Oregon | |
| OREGON-WHEAT | CHILI-WHEAT[39]; | TR.AE | W | USA | |
| OREGON-ZIMMERMAN | K-44413; CI-7359; CI-10039; AFRC-9270 | ZIMMERMAN[39][1111]; | TR.AE | S | USA:Oregon |
| ORELL | TR.SE | W | DEU | ||
| ORELLO | K-57740; AFRC-7546; AUS-24535; ERGE-739 | TR.AE | S | CHE:Zurich | |
| ORELLO-92431 | TR.AE | S | CHE |