Table 1.
Analyses of variance of infectivity, as a function of pathogen origin (north versus south), host cultivar (Victo versus Acalou) and pathogen isolate, at five incubation temperatures
| Source | df | Denominator | Denominator df | Mean square (×10−2) | F | P |
|---|---|---|---|---|---|---|
| Origin | 1 | (1) | 15 | 0.123 | 0.28 | 0.6075 |
| Cultivar | 1 | (2) | 15 | 0.817 | 8.48 | 0.0110 |
| Temperature | 4 | (3) | 60 | 32.870 | 82.52 | <0.0001 |
| Isolate[origin] (1) | 15 | (2)+(3)−(4) | 52 | 0.446 | 1.07 | 0.4063 |
| Isolate*cultivar[origin] (2) | 15 | (4) | 60 | 0.097 | 1.25 | 0.2653 |
| Isolate*temperature[origin] (3) | 60 | (4) | 60 | 0.398 | 5.11 | <0.0001 |
| Origin*temperature | 4 | (3) | 60 | 1.580 | 3.97 | 0.0064 |
| Cultivar*temperature | 4 | (4) | 60 | 2.651 | 34.03 | <0.0001 |
| Origin*cultivar | 1 | (2) | 15 | 0.170 | 1.76 | 0.2053 |
| Origin*cultivar*temperature | 4 | (4) | 60 | 0.033 | 0.43 | 0.7888 |
| Residual (4) | 60 | 0.078 |
The denominator column indicates the terms used as denominator for F-tests. Isolate was taken as a random factor.