TABLE 1.
Scale | Disease intensity | Reaction |
1 | No disease visible on any plant | Highly resistant |
3 | Lesions visible on <10% of the plants, no stem girdling | Resistant |
5 | Lesions visible on up to 25% plants, stem girdling on <10% plants but little damage | Moderately resistant |
7 | Lesions present on most of the plants, stem girdling on 50% of the plants and resulting death of a few plants causing considerable damage | Susceptible |
9 | Lesions profuse on all plants stem girdling present on >50% of plants and death of most of the plants | Highly susceptible |
The AB3279 and AB482 populations were scored for disease reaction on a 1–9 rating scale. Lines with a disease rating of ≤4 were considered resistant, and lines with disease rating of 5–6 were considered moderately resistant; and those with rating of above 6 were considered susceptible to highly susceptible.