Increased virulence of Puccinia coronata f. sp.avenae populations through allele frequency changes at multiple putative Avr loci.
Pathogen populations are expected to evolve virulence traits in response to resistance deployed in agricultural settings.However, few temporal datasets have been available to characterize this process at the population level.Here, we examined two temporally separated populations of Puccinia coronata f.sp.avenae (Pca), which causes crown rust diseas