Thisis while no published report is yet available on the genetic variationamong and within Iranian ajowan populations based on morpho-logical and molecular markers. Clearly, a general understanding ofthe genetic relationships is crucial for preserving the biodiversity ofthis medicinal plant. Moreover, the industrial benefits of this plantmay be guaranteed if proper populations are selected that yield notonly high genetic distances but also such traits of high commercialvalue as high essential oil content, seed yield, and 1000 seed weight