Table 1. Sex-specific fitness for each genotype (wf and wm for females and males, respectively).
A m, A mA m | A mA f | A f, A fA f | |
---|---|---|---|
B1, B1B1 | wf = 1 – sf | wf = 1 – kfsf | wf = 1 |
wm = 1 | wm = 1 – kmsm | wm = 1 – sm | |
B1B2 | wf = (1 – sf)(1 – htf) | wf = (1 – kfsf)(1 – htf) | wf = 1 – htf |
wm = 1 – htm | wm = (1 – kmsm)(1 – htm) | wm = (1 – sm)(1 – htm) | |
B2, B2B2 | wf = (1 – sf)(1 – tf) | wf = (1 – kfsf)(1 – tf) | wf = 1 – tf |
wm = 1 – tm | wm = (1 – kmsm)(1 – tm) | wm = (1 – sm)(1 – tm) |
For the sexually antagonistic locus (locus A), there are four parameters: sex-specific selection coefficients, sf and sm, against the deleterious allele for each sex, and dominance coefficients, kf and km (0 < sm, sf < 1; 0 < km, kf < 1). We use three parameters for the B locus: sex-specific selection coefficients, tm and tf, for the cost of the deleterious allele (B2), and a single dominance coefficient (h) with respect to B2, which we assume does not differ between the sexes (0 < tm, tf, h < 1).