Eight novel diagnostic markers differentiate lineages of the highly invasive myrtle rust pathogen .

is the causal agent of myrtle rust in over 480 species within the family Myrtaceae. Lineages of are structured by their hosts in the native range, and some have success in infecting newly encountered hosts. For example, the pandemic biotype has spread beyond South America, and proliferation of other lineages is an additional risk to biodiversity and industries.