| Code | Definition | Number of Accessions |
| 1N | Height-length ratio >= 0.95 and height-thickness ratio 1.11 - 1.39 | 128 |
| 1R | Height-length ratio >= 0.95 and height-thickness ratio <= 1.10 | 16 |
| 2F | Height-length ratio 0.87 - 0.94 and height-thickness ratio >= 1.40 | 38 |
| 2N | Height-length ratio 0.87 - 0.94 and height-thickness ratio 1.11 - 1.39 | 3750 |
| 2R | Height-length ratio 0.87 - 0.94 height-thickness ratio <= 1.10 | 18 |
| 3F | Height-length ratio 0.79 - 0.86 and height-thickness ratio >= 1.40 | 95 |
| 3N | Height-length ratio 0.79 - 0.86 and height-thickness ratio 1.11 - 1.39 | 4283 |
| 3R | Height-length ratio 0.79 - 0.86 height-thickness ratio <= 1.10 | 6 |
| 4F | Height-length ratio 0.71 - 0.78 and height-thickness ratio >= 1.40 | 158 |
| 4N | Height-length ratio 0.71 - 0.78 and height-thickness ratio 1.11 - 1.39 | 491 |
| 5F | Height-length ratio <= 0.70 and height-thickness ratio >= 1.40 | 84 |
| 5N | Height-length ratio <= 0.70 and height-thickness ratio 1.11 - 1.39 | 91 |