Figure 2.

Host-only model with resistance dependent on phenotypic differences (A,C) or phenotypic matching (B,D) between hosts and parasites. (A and B) Allelic effects inferred using the host-only design from Equation 6: ${\beta }_0$ (black), ${\beta }_{H1}$ and ${\beta }_{H2}$ (solid red lines), ${\beta }_{H1,H2}$ (dashed red). (C and D) Variation explained by host additive effects only (solid line), and host additive and epistatic effects (dashed line) as given by the host-only model in (6).