Herbarium collections are an important source of historical DNA, whose analysis can shed light on the evolutionary history of plant pathogens. Here, Campos et al. reconstruct historical genomes of the bacterial crop pathogen Xanthomonas citri pv. citri from citrus herbarium specimens, estimating that the pathogen originated in Southern Asia ~11,500 years ago and diversified during the beginning of the 13th century.
- Paola E. Campos
- Olivier Pruvost
- Lionel Gagnevin