It has been proved that it is possible to create a new breeding material or increase the productivity of an existing one by obtaining stable self-pollinated lines on its basis, followed by their free pollination and propagation according to a specially developed technique (by the type of creation of a synthetic variety). Moreover, at the initial stages of breeding, it is important to select self-pollinated lines according to the set of desired characteristics, at the final stages of closely related breeding, leave only those lines that form the smallest number of seeds as a result of self-pollination, and according to the nursery, estimates in the absence of spatial isolation and free pollination with pollen of various origin characterized by high seed productivity. This technique allows you to select genotypes that are less capable of self-pollination, and more capable of cross-pollination, which in the future will increase the viability and productivity of generation.