Table 3.

Descriptions of the three fitness schemes imposed on “adaptive” loci. The total strength of selection against possible genotypes across the three adaptive loci is shown (s _adaptive) along with a description of the different genotypes. Total s _adaptive was subtracted from 1 when determining the relative fitness of an individual during simulation

Total s adaptive	Genotype description
(A) Directional selection
n ALT (s adaptive)	Where n ALT is the number of alleles with ancestry from the “unfit” parent.
(B) Disruptive selection
n MINOR (s adaptive)	Where n MINOR is the number of minor ancestry alleles if the number of minor ancestry alleles is less than three or all adaptive loci are heterozygous.
5 (s adaptive)	If two loci are homozygous with different ancestry and the third is heterozygous.
(C) Selection‐for‐admixture
6 (s adaptive)	If homozygous for the same ancestry across all adaptive loci.
5 (s adaptive)	If two loci are homozygous for the same ancestry and the third is heterozygous.
n HET (s adaptive)	Where n HET is the number of heterozygous loci if >1 locus is heterozygous.
1 (s adaptive)	If two loci are homozygous with different ancestry and the third is heterozygous.
0 (s adaptive)	If two loci are homozyous with ancestry from the same parent and the third is homozygous with ancestry from the other parent.