| Code | Definition | Number of Accessions |
| 1 | awnless | 50 |
| 2 | very short-awnletted <10 mm, upper part of spike | 878 |
| 3 | short-awnletted 10-20 mm, upper part of spike | 384 |
| 4 | awnletted 21-40 mm, upper part of spike | 69 |
| 5 | long-awnetted 41-60 mm, upper part of spike | 23 |
| 6 | short awned <40 mm, whole spike | 119 |
| 7 | awned >length of spike | 669 |
| 8 | long awned <two times length of spike | 23 |
| 9 | very long awned >two times length of spike | 1 |