| Code | Definition | Number of Accessions |
| 1 | very low <45,00 (g/100 g dry matter) | 6 |
| 2 | 45,01-46,50 (g/100 g dry matter) | 5 |
| 3 | low 46,51-48,00 (g/100 g dry matter) | 6 |
| 4 | 48,01-49,50 (g/100 g dry matter) | 6 |
| 5 | intermediate 49,51-51,00 (g/100 g dry matter) | 13 |
| 6 | 51,01-52,50 (g/100 g dry matter) | 21 |
| 7 | high 52,51-54,00 (g/100 g dry matter) | 36 |
| 8 | 54,01-55,50 (g/100 g dry matter) | 27 |
| 9 | very high >55,50 (g/100 g dry matter) | 10 |