Table 1.

List of variables and parameters used for simulating evolution within hybrid swarms

Variable/parameter	Description	Values used
N	Total number of diploid individuals within each population.	1,000
n‐loci	Number of diploid loci: two pairs of epistatic loci; three loci additively affecting fitness.	7
Generations	Number of generations populations were monitored.	1,000
s epistatic	Selection coefficient acting against mismatched alleles at epistatic loci.	0.000, 0.001, 0.01, 0.05, 0.10
s adaptive	Selection coefficient acting against parent #2 alleles at loci additively affecting fitness in the environment.	0.00, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10
r	Recombination rate between adjacent loci.	0.1, 0.2, 0.5
m	Probability of migration into from parental populations into hybrid zone.	0, 0.0001, 0.001, 0.01
Genetic architecture	Arrangement of epistatic and adaptive loci along a chromosome.	3 Different architectures (see Section 2 and Figure 1).