Evaluation of large-seeded sunflower forms from the collection of the N. I. Vavilov All-Russian Institute of Plant Genetic Resources (VIR)

The purpose of the research was to study and identify among the collection samples of sunflower from the N. I. Vavilov All-Russian Institute of Plant Genetic Resources (VIR) the most promising ones for the development of new large-seeded source material. The studies were carried out in 2022-2023 on the fields of the Don experimental station - a branch of the V.S. Pustovoit All-Russian Research Institute of Oil Crops in accordance with the methods of conducting field experiments with oil crops. In the source material nursery, 30 foreign and Russin samples of confectionery sunflower from the VIR collection were studied. Among the 30 studied numbers, only 13 had a weight of 1000 seeds above 100 g, which indicates their large-seeded size. According to the method of A.I. Mamonov on the differentiation of genotypes by the size of achenes using the indicator of the number of seeds in 1 liter, it was confirmed that all 12 samples are large-seeded. According to meanings of oil content and huskness, nine samples belong to edible type, and three - confectionary type.