INBREEDING COEFFICIENTS OF FIELD POPULATIONS OF KOCHIA-SCOPARIA USINGCHLORSULFURON RESISTANCE AS A PHENOTYPIC MARKER

Inbreeding coefficients were determined for nine southeastern Idaho ko chia populations using chlorsulfuron resistance as a phenotypic marker . Inbreeding coefficients in six of the populations approximated 0, in dicating that these field populations were random mating. One populati on had an inbreeding coefficient of 0.32, indicating partial selfing. No susceptible genotypes were identified in one population, which sugg ested recent selection and skewed the inbreeding coefficient. One popu lation had an inbreeding coefficient of -0.19, suggesting either heter ozygote advantage or some recent selection in the population. Our resu lts suggest that kochia populations generally approximate random matin g. Therefore, unlinked alleles will be independently assorted in field populations of kochia.