Table 2.
Virulence of Fusarium oxysporum isolates in different subclades in the phylogenetic tree of elongation factor-1 alpha gene sequences on cucurbitaceous vegetables at 4 weeks after inoculation
| Sub clade* | Isolate† | Disease index‡ | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||||
| Watermelon | Oriental melon | Shintosa | Cucumber | Total | |||||||
| 1 | F10 | 0.75 ± 0.89ab§X|| | 0.97 ± 0.85aX | 0.75 ± 0.71cdX | 0.91 ± 0.62aXY | 0.88 ± 0.71aX | 0.63 ± 0.54abYZ | 0.63 ± 0.52bcdX | 0.50 ± 0.51bZ | 0.75 ± 0.69ab | 0.96 ± 0.75a |
| F21 | 0.38 ± 0.52bX | 0.25 ± 0.46dX | 0.25 ± 0.46cdX | 0.13 ± 0.35eX | 0.25 ± 0.45c | ||||||
| FOM | 1.38 ± 1.06aX | 1.75 ± 0.46aX | 0.38 ± 0.46bcdY | 0.38 ± 0.52deY | 0.97 ± 0.64a | ||||||
| FON | 1.38 ± 0.92aX | 0.88 ± 0.83cX | 1.00 ± 0.83aX | 0.88 ± 0.64abcX | 1.03 ± 0.73a | ||||||
| 2 | F4 | 1.00 ± 0.763abY | 0.92 ± 0.78aX | 1.75 ± 1.49aX | 1.17 ± 0.96aX | 0.63 ± 1.49aYZ | 0.25 ± 0.29bY | 0.50 ± 0.53cdeZ | 0.25 ± 0.41bY | 0.97 ± 0.82a | 0.56 ± 0.69b |
| F19 | 0.75 ± 1.04abXY | 1.13 ± 0.64bcX | 0.00 ± 0.00dZ | 0.13 ± 0.35eYZ | 0.50 ± 0.51bc | ||||||
| F23 | 1.00 ± 0.53abX | 0.63 ± 0.74cdXY | 0.13 ± 0.74dY | 0.13 ± 0.35eY | 0.47 ± 0.50bc | ||||||
| 3 | F20 | 1.00 ± 0.76abX | 1.00 ± 0.76aX | 0.88 ± 0.64cX | 0.88 ± 0.64aXY | 0.63 ± 0.64abcX | 0.63 ± 0.74abYZ | 0.38 ± 0.52deX | 0.38 ± 0.52bZ | 0.72 ± 0.68a | 0.72 ± 0.68ab |
| 4 | F8 | 0.88 ± 0.35abX | 0.63 ± 0.55aZ | 1.00 ± 0.76bcX | 1.25 ± 0.76aX | 0.75 ± 0.76abX | 0.69 ± 0.49aYZ | 1.25 ± 0.71aX | 1.13 ± 0.62aXY | 0.97 ± 0.57a | 0.63 ± 0.72b |
| F9 | 0.38 ± 0.74bY | 1.50 ± 0.76abX | 0.63 ± 0.76abcY | 1.00 ± 0.53abXY | 0.88 ± 0.64a | ||||||
| Total | 0.90 ± 0.93X | 1.08 ± 1.40X | 0.49 ± 0.33Y | 0.53 ± 0.43Y | 0.75 ± 0.62 | ||||||
Subgroup of F. oxysporum clade as shown in Fig. 2.
F. oxysporum isolates from oriental melon greenhouses and F. oxysporum f. sp. melonis (FOM) and F. oxysporum f. sp. niveum (FON) provided from Rural Development Administration, Korea.
Disease index of 0 to 5; 0 = no symptom; 1 = underground stem yellow-brownish discolored; 2 = < 30% above-ground stem brownish discolored; 3 = stem bottom region decayed; 4 = stem darkly discolored and split; 5 = whole plant dead, which is modified from Bletsos (2005).
Means with the same letters (a, b, c) are not significantly different within the same column at P ≤ 0.05 by least significant difference (LSD) test.
Means with the same letters (X, Y, Z) are not significantly different within the same row at P ≤ 0.05 by LSD test.