| Variety | Resistance to root rot disease | No disease year | Middle susceptible year | Serious susceptible year | Average | Alteration index % |
| Harosoy | S | 38.2 | 34.7 | 13.3 | 28.7 | 86.7 |
| Harosoy63 | R | 38.1 | 39.7 | 43.7 | 40.5 | 13.9 |
| Howcoy | S | 35.6 | 29.1 | 7.1 | 23.9 | 119.1 |
| Howcoy63 | R | 35.1 | 37.9 | 41.9 | 38.3 | 17.8 |
| Lindalin | S | 37.3 | 31.0 | 10.5 | 26.3 | 102.0 |
| Lindalin63 | R | 35.9 | 39.4 | 38.8 | 38.0 | 9.5 |
| Clark | S | 40.0 | 35.4 | 24.1 | 33.2 | 47.9 |
| Clark63 | R | 40.0 | 41.7 | 44.4 | 42.2 | 9.6 |