Table 1. The virulence spectrum of 133 isolates of Cladosporium fulvum collected in Japan as determined on a differential set of tomato cultivars carrying different Cf genes.
| Resistance gene a | Virulence spectrum of the isolates collected in Japan b | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 2 | 4 | 9 c | 2.4 | 2.9 c | 2.5.9 | 4.9 c | 4.5.9 c | 4.11 | 2.4.11 | 4.9.11 c | |
| - | V | V | V | V | V | V | V | V | V | V | V | V |
| Cf-2 | A | V | A | A | V | V | V | A | A | A | V | A |
| Cf-4 | A | A | V | A | V | A | A | V | V | V | V | V |
| Cf-5 | A | A | A | A | A | A | V | A | V | A | A | A |
| Cf-6 | A | A | A | A | A | A | A | A | A | A | A | A |
| Cf-9 | A | A | A | V | A | V | V | V | V | A | A | V |
| Cf-4, Cf-11 | A | A | A | A | A | A | A | A | A | V | V | V |
| Number of collected isolates | 12 | 15 | 17 | 1 | 2 | 8 | 2 | 5 | 4 | 46 | 5 | 16 |
a A differential set of tomato cultivars including ‘Potentate’ (no Cf resistance gene), ‘Vetomold’ (Cf-2), ‘Purdue 135’ (Cf-4), ‘Moneymaker-Cf-5’ (Cf-5), ‘Ontario 7818’ (Cf-6), ‘Moneymaker-Cf-9’ (Cf-9), and ‘Ontario 7716’ (Cf-4 and Cf-11) was used for inoculation to determine the virulence spectrum.
b V, virulent on cultivar; A, avirulent on cultivar
c Races unique to the Japanese Cladosporium fulvum population