| Code | Definition | Number of Accessions |
| 1 | very low <0,5 g - two-rowed <1,0 g - six-rowed | 7 |
| 2 | 0,5-0,6 g - two-rowed 1,0-1,1 g - six-rowed | 22 |
| 3 | low 0,7-0,8 g - two-rowed 1,2-1,4 g - six-rowed | 79 |
| 4 | 0,9-1,0 g - two-rowed 1,5-1,8 g - six-rowed | 246 |
| 5 | medium 1,1-1,2 g - two-rowed 1,9-2,1 g - six-rowed | 280 |
| 6 | 1,3-1,4 g - two-rowed 2,2-2,4 g - six-rowed | 144 |
| 7 | high 1,5-1,6 g - two-rowed 2,5-2,7 g - six-rowed | 36 |
| 8 | 1,7-1,8 g - two-rowed 2,8-3,0 g - six-rowed | 2 |
| 9 | very high >1,8 g - two-rowed >3,0 g - six-rowed | 2 |