Varietal and Environmental Effects on Rapeseed: I. Isothiocyanate and Thiooxazolidone Content

The isothiocyanate and thiooxazolidone content was determined on seven rapeseed varieties grown at seven locations across Western Canada. The isothiocyanate content varied significantly for varieties but not for stations whereas the thiooxazolidone content differed significantly for both varieties and stations. The Argentine-type could easily be distinguished from the Polish-type as the thiooxazolidone content was approximately three times greater in the former. No such varietal distinction was found for the isothiocyanate content.