| Code | Definition | Number of Accessions |
| 1 | Yield of SPLCV-infected >150% of virus-tested | 5 |
| 3 | Tolerant, yield of SPLCV-infected 90-125% of virus-tested | 6 |
| 4 | Intermediate, yield of SPLCV-infected 50-90% of virus-tested | 18 |
| 5 | Sensitive, yield of SPLCV-infected 25-50% of virus-tested | 11 |
| 6 | Very sensitive, yield of SPLCV-infected <25% of virus-tested | 6 |
| V | Variable from year to year | 6 |