Figure 2.

Three examples of sliding window analyses showing non‐neutral patterns polymorphism and divergence. (a) Drosophila Adh, showing a peak of intraspecific variation associated with the only amino acid polymorphism in the population (adapted from Hudson & Kreitman 1991; see also Begun et al. 1999). (b) Maize and teosinte tb1, showing reduction of diversity in maize in the 5′ untranslated region of the gene (adapted from Wang et al. 1999). (c) Arabidopsis thaliana Rpm1 region (adapted from Stahl et al. 1999). Dark line shows divergence between A. thaliana resistant (Rpm1 present) and susceptible (Rpm1 deleted) alleles, and the dotted line shows divergence between A. thaliana and A. lyrata. The arrow marks the location of the Rpm1 insertion/deletion.