Figure 6.

The relationship between the proportion of surviving animals $P_{\text{2,obs}}$ and $P_1$ using Monte Carlo simulation (MC_lin) and multiple regression (MR_lin) either with no genetic correlation ($r_{A_{v,1},A_{m,2}}=0$) or with a negative genetic correlation ($r_{A_{v,1},A_{m,2}}=-0.5$) (MC_nonlin, MR_nonlin) between environmental variance in $P_1$ and the mean of $P_{\text{2,liab}}$ on the underlying scale (${\sigma }_{A_{m,1}}^2={\sigma }_{A_{m,2}}^2=0.3,{\sigma }_{A_{v,1}}^2=0.05,{\sigma }_{e_1}^2\text{exp}\left(\left(1/2\right){\sigma }_{A_{v,1}}^2\right)=0.7,$ ${\sigma }_{e_2}^2=0.7,$ $r_{A_{m,1},A_{m,2}}=0.2,$ $r_{A_{m,1},A_{v,1}}=0,$ $r_e=0,$ average proportion for $P_{\text{2,obs}}$ = 0.9).