Effects in the statistical model were block, genotype, source soil, maternal soil, the maternal soil by genotype interaction and the maternal soil by source soil interaction.
In summary, the explanatory variables in the statistical model were block, genotype group, source soil, growing soil, the growing soil by genotype interaction and the growing soil by source soil interaction (Table 1A).
This genetic association is thus upheld in spite of a known genotype-by-genotype interaction and environmental variation.
In the section entitled "Model interrogation", we describe five scenarios, which are used to explore the values of the parameters that maintain genetic variation in worms (Scenarios 1 and 2), describe the properties of the worm infection and genotype by genotype interaction (Scenarios 3 and 4) and test the hypotheses (Scenario 5).
We examined whether dietary or total calcium or vitamin D modified associations by genotype; interaction terms between genotypes and each dietary variable in continuous form were included in the conditional logistic regression models.
Also, while restricting the main analysis in the paper to a model without interaction, we gave a simple example of how "the site by genotype interaction can be investigated" and reported 8 out of 53 analytes to have a significant (p < 0.05) genotype by environment interaction (1, p. 19).
However, the WT and GluA1−/− groups were still indistinguishable (effect of genotype and delay by genotype interaction, F values < 1).
Treatment, order of treatment, genotype, and treatment by genotype interaction were fixed effects; individuals were random effects.
This model includes treatment, genotype, a treatment-by-genotype interaction, sex, age and the baseline risk score as fixed effects.
Principal analyses used hierarchical multiple regression to examine the influence of covariates, induction type, genotype, and induction-by-genotype interaction; the latter term was examined for evidence of a moderating genetic influence [ 68].
Another study demonstrated the existence of such genotype by genotype interactions between P. falciparum and An.
