Orobanche cumana Wallr. known as sunflower broomrape is a holoparasitic plant that causes huge yield losses in (Helianthus annuus L.) fields. Genetic characterization, genetic diversity, and race determination studies O. are very significant for preventing threats In this study, the populations sampled from Edirne, Kırklareli, Tekirdağ, Adana provinces were used characterization. The sensitive ...