Spatial distribution of individual genotypes in a subpart (of size 500 grid units × 700 grid units) of the total grid after the last cycle in one replicate of subset 6d (L = 1000; D = P = 10; C = 1; S = 0.5), with SC; −, o, |, for genotype AA, Aa, and aa, respectively. Spatial distribution of individual genotypes in a subpart (of size 500 grid units × 700 grid units) of the total grid after the last cycle in one replicate of subset 6d (L = 1000; D = P = 10; C = 1; S = 0.5), with SC; −, o, |, for genotype AA, Aa, and aa, respectively. Agnès Doligez et al. Genetics 1998;148:905-919 Copyright © 1998 by the Genetics Society of America