Population Diversity of Puccinia graminis is Sustained Through Sexual Cycle on Alternate Hosts
A high degree of virulence diversity has been maintained in the population of Puccinia graminis f.sp.tritici (Pgt) in northwestern United States.Although Berberis vulgaris is present in the region and Pgt has been isolated from aecial infections on B.vulgaris, the 149 population is too diverse to be explained by the limited presence of B.vulgaris a