Table 1. Effect of watering, virus accumulation and experimental replicate on aphid transmission efficiency of CaMV and TuMV.
Response trait | Factorsa and interactions | Full modelb | Reduced model | ||||
---|---|---|---|---|---|---|---|
dfc | Deviance | P-value | dfc | Deviance | P-value | ||
Transmission rate of CaMVa | Watering | 1 | 24.56 | <0.0001 | 2 | 30.99 | <0.0001 |
Virus accumulation (log) | 1 | 1.42 | 0.232 | ||||
Replicate | 2 | 9.93 | 0.007 | 2 | 8.986 | 0.011 | |
Watering x Accumulation | 1 | 0.222 | 0.637 | ||||
Watering x Replicate | 2 | 0.367 | 0.832 | ||||
Accumulation x Replicate | 2 | 2.252 | 0.324 | ||||
Replicate x Accumulation x Watering | 2 | 3.253 | 0.197 | ||||
Transmission rate of TuMVa | Watering | 1 | 30.62 | <0.0001 | 2 | 214.6 | <0.0001 |
Virus accumulation (log) | 1 | 18.28 | <0.0001 | 2 | 18.27 | 0.0002 | |
Replicate | 2 | 0.489 | 0.783 | ||||
Watering x Accumulation | 1 | 0.357 | 0.550 | ||||
Watering x Replicate | 2 | 1.391 | 0.500 | ||||
Accumulation x Replicate | 2 | 0.990 | 0.610 | ||||
Replicate x Accumulation x Watering | 2 | 10.40 | 0.006 |
a Factors are watering regime (nutrient solution; well-watered vs. water deficit), virus accumulation (log-transformed) and experimental replicate (n = 3).
b The full model, including all factors and interactions, is tested using a generalized linear model (GLM) with binomial (logit) link function.
c The reduced model includes only significant terms after sequential removal of non-significant terms and interaction.