Table 3.
Results of a generalized linear model of spore load in a randomly collected subsample of eight beetles per experimental block.
| Factor | Df | Deviance | Resid. Df | Resid. Dev | P(> |Chi|) | |||
|---|---|---|---|---|---|---|---|---|
| Null deviance | 379 | 10657902 | ||||||
| Individual mortality (Dead/Alive) | 1 | 8698191 | 378 | 1959711 | < 0.001 | |||
| factor(Line) | 4 | 113410.1 | 374 | 1846301 | < 0.001 | |||
| Parasite | 4 | 199320.9 | 370 | 1646980 | < 0.001 | |||
| Selection | 1 | 77375.2 | 369 | 1569605 | < 0.001 | |||
| Line:Parasite | 16 | 191614.9 | 353 | 1377990 | < 0.001 | |||
| Line:Selection | 4 | 22822.19 | 349 | 1355168 | 0.303 | |||
| Parasite:Selection | 4 | 139426.9 | 345 | 1215741 | < 0.001 | |||
| Line:Parasite:Selection | 16 | 146398.9 | 329 | 1069342 | 0.013 | |||
| Results of post hoc contrast analysis of spore load | ||||||||
| Within host (coevolved lines) | Within parasite (coevolved lines) | Within host (control lines) | Within parasite (control lines) | |||||
| Line/Isolate | Z value | P | Z value | P | Z value | P | Z value | P |
| 1 | -0.29 | 0.939 | -0.07 | 1.000 | 0.48 | 0.983 | 0.60 | 0.982 |
| 3 | 0.47 | 0.822 | 0.38 | 0.998 | -0.55 | 0.973 | 2.09 | 0.169 |
| 4 | 0.11 | 0.998 | 0.52 | 0.990 | 3.02 | 0.012 | -1.21 | 0.726 |
| 5 | 0.03 | 1.000 | 0.04 | 1.000 | 1.28 | 0.618 | -0.29 | 0.999 |
| 6 | 0.56 | 0.753 | 0.52 | 0.990 | -0.61 | 0.961 | 0.06 | 1.000 |
Levels of significance of GLM model fits were tested using analysis of deviance with chi-square distribution. Post hoc test results for contrasts between sympatric and allopatric combinations are shown below. Positive Z values indicate combinations where were local antagonists show higher spore load than foreign antagonists.