Abstract
Confectionary sunflower variety SPK plus was developed by a method of the individual selection and the further estimation by progenies, and the directed re-pollination of the best families. Due to the results of the variety trials of 2019–2021, the new variety exceeded the standard variety on yield by 0.29 t per ha, on 1000 seeds weight – the main trait for the confectionary sunflower – by 11.2%. The vegetative period is 98–100 days. The seeds are large, fully formed, 1000 seeds weight at the recommended plant population (30 thousands plants per ha) is equal 155–160 g. the variety is highly resistant to lodging. It is respon-sive to fertilizers and sufficient moistening. In zones of the unstable and insufficient moistening, it is able to realize productivity potential at the high agricultural background. The variety SPK plus is included into the State register of the breeding achievements of the Russian Federation from 2022 and released for production in the Central Chernozem (5), Northern Caucasus (6) Middle Volga (7), and Low Volga (8) regions. The originator of the variety is V.S. Pustovoit All-Russian Research Institute of Oil Crops.
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