Fig. 1.

NAGC alters divergence patterns. (A) NAGC can drive otherwise rare divergence patterns, like the sharing of alleles between paralogs but not orthologs. (B) An example of a local change in genealogy, caused by NAGC. (C) Examples of divergence patterns in a small multigene family. Some divergence patterns—such as the one highlighted in purple—were both rare and spatially clustered. We hypothesized that underlying these changes are local changes in genealogy, caused by NAGC. (D) Genealogy map (null genealogy marked by white, NAGC marked by purple tracts) inferred by our HMM based on observed divergence patterns (stars). Two different gene families are shown. For simplicity, only the most informative patterns (purple and gray sites, as exemplified in C) are plotted.