Fig. 2: Epigenetic variation in hybrid zones.
From: Epigenetic variation in light of population genetic practice
Hybrid zones allow to concomitantly study epigenetic variation and genetic ancestry and may help pinpointing the source of epigenetic variation (upper two panels). Cline analysis is a powerful tool to infer selection on both genetic and epigenetic variation and compare the two (lower panel). Geographic cline analysis characterizes the change of variation in genetic and epigenetic loci (here DNA methylation) on a spatial axis, whereas genomic cline analyses depict epigenetic divergence as a function of genome-wide ancestry.
