Mutation bias reflects natural selection in Arabidopsis thaliana

Summary

Researchers studying Arabidopsis thaliana found that mutations are not random but occur less often in essential and functionally important genes—about half as often within genes and two-thirds less in essential ones. Epigenomic and physical genome features explain over 90% of this variation, and these mutation patterns accurately predict natural genetic diversity. The results show that epigenome-linked mutation bias protects key genes, challenging the traditional view that mutation is a random, directionless process in evolution.