Transferring of an imidazolinone resistance gene to the sunflower breeding material in VNIIMK

Sunflower germplasm of 29 genotypes did not contain any imidazolonone resistant plants. Inbred lines of HA425 and RHA426 possessed resistance which was controlled by a single semidominant gene. Corresponding crosses of HA425 and RHA426 with VK876 and VK508 after both selfing and selection of resistant plants lead to the development of a new breeding material as 44 constant F5 - lines. In 10 days after treatment with herbicide Pulsar RHA426 showed the necroses of Orobanche tubercles on the roots.