Table 1.

Description of each locus in the model with initial allelic frequencies in all 3 populations

Locus	Trait expression	Max. number of alleles	Initial conditions
A	(D-M)epistatic incompatibility with B locus	2	A1 fixed in ssp.1, A2 fixed in ssp.2 (both sympatric and allopatric populations)
B	(D-M)epistatic incompatibility with A locus & Divergent Ecological Fitness	3	Ecological scenario 1: B1 fixed in ssp.1, B2 fixed in ssp.2 (both sympatric and allopatric populations) Ecological scenario 2: B1 fixed in ssp.1, B2 fixed in sympatric ssp.2 and 0.95 in allopatric ssp.2 B3 is 0.05 in allopatric ssp.2
C	Male sexual cue trait for D locus	2	C1 fixed in ssp.1 and in allopatric ssp.2, C2 is 0.05 in sympatric ssp.2
D	Female mating preference for C locus	2	D1 fixed in ssp.1 and in allopatric ssp.2, D2 is 0.05 in sympatric ssp.2