Genetic variation and relationships of herbicide-resistant and -susceptible biotypes of Lindernia micrantha

The process of resistance evolution to ALS-inhibitors in Lindernia micranth a populations was investigated using molecular markers. The results indicat ed that populations of resistant biotypes contained less variation than tho se of susceptible biotypes, and that in some cases the populations of resis tant biotypes were nested in the populations of susceptible biotypes. We co ncluded that multiple founding events of resistant biotypes occurred in L. micrantha populations in Japan.