Table 1 Model comparison. The table compares the global model and the derived models in terms of the Akaike criterion, log-likelihood, and ANOVA values. Wing pigmentation is a ratio: the mean pigmentation of the wing divided by the total wing area. The base model is model 1 which is the most complex model. Subsequent models are subsets of the base model. As a single variable term gets dropped, both the earlier and the reduced model are compared with the likelihood ratio test statistic. A p-value < 0.05 indicates the variable dropped contributed significantly to the model and needs to be retained. Also, an AIC value greater than 2 of the base model suggests that the derived model has not a good fit
From: Wing spot in a tropical and a temperate drosophilid: C = C enrichment and conserved thermal response
Model | Comparison | AIC | Loglik | Chisq | df | P-value |
|---|---|---|---|---|---|---|
Model 1: Wing pigmentation ~ Species + Temperature + Species: Temperature + (1|Iso-female lines) + (1|Replicates) + (1|Symmetry) | 4373.4 | −2176.7 | ||||
Model 2: Wing pigmentation ~ Species + Temperature + (1|Iso-female lines) + (1|Replicates) + (1|Symmetry) | Model 2, Model 1 | 4407.6 | −2195.8 | 38.154 | 2 | < 0.001 |
Model 3: Wing pigmentation ~ Species + (1|Iso-female lines) + (1|Replicates) + (1|Symmetry) | Model 3, Model 1 | 4919.5 | −2453.8 | 554.09 | 4 | < 0.001 |
Model 4: Wing pigmentation ~ Temperature + (1|Iso-female lines) + (1|Replicates) + (1|Symmetry) | Model 4, Model 1 | 4551.3 | −2268.7 | 183.91 | 3 | < 0.001 |
Model 5: Wing pigmentation ~ 1 + (1|Iso-female lines) + (1|Replicates) + (1|Symmetry) | Model 5, Model 1 | 4996.7 | −2493.4 | 633.34 | 5 | < 0.001 |