| Code | Definition | Number of Accessions |
| 1 | very low spring: <0,30 winter: <0,30 | 1 |
| 2 | spring:0,30-0,33 winter:0,30-0,34 | 1 |
| 3 | low spring:0,34-0,37 winter:0,35-0,39 | 2 |
| 4 | spring:0,38-0,41 winter:0,40-0,44 | 11 |
| 5 | medium spring:0,42-0,45 winter:0,45-0,49 | 54 |
| 6 | spring:0,46-0,49 winter:0,50-0,54 | 138 |
| 7 | high spring:0,50-0,53 winter:0,55-0,59 | 183 |
| 8 | spring:0,54-0,57 winter:0,60-0,64 | 167 |
| 9 | very high spring: >0,57 winter: >0,64 | 95 |