Table 1.

Parameters of the model, and the values used in our computer simulations

Symbol	Explanation	Values
N	Population size per patch	${1000}^{*},200$
L	Number of adaptive loci	${100}^{*},2000$
m	Migration rate	0.1*
${\theta }^{\left(k\right)}$	Optimal phenotype in population $k=1,2$	${\theta }^{\left(1\right)}=2^{*},{\theta }^{\left(2\right)}=-2^{*}$
σ	Selection parameter	$4^{*},3.5,2.5^{*}$
r	Recombination rate	$0.{0005}^{*},0.001$
μ	Mutation rate	$2\times {10}^{-5*},{10}^{-4}$
σμ	Root mean square of mutation‐effect sizes	$0.{05}^{*},0.05/\sqrt{20}$

The symbol “*” indicates the parameter values used for the results shown in the main text. Results for other parameter values are shown in Supporting Information.