Varieties and antioxidant indices of red currant of Chelyabinsk breeding in the conditions of the Middle Urals

The unique scientific installation of the collection of live plants in the open ground "Gene pool of fruit, berry and ornamental crops in the Middle Urals" at the Sverdlovsk Breeding Station of Horticulture has about 2 thousand varieties and 80 thousand hybrids of fruit and berry crops, of which 45 varieties are red currant. The article presents the results of study of 10 red currant varieties of the South-Ural Scientific Research Institute of Horticulture and Potatoes in the conditions of the Sverdlovsk Region (Middle Urals). The prevailing weather conditions during the research period (2019-2022) affected the timing of the passage of the phenological phases of red currant varieties. In 2019 the beginning of bud break was noted from the 20^th of April to the 25th of April, the beginning of flowering ‒ from the 5^th of May to the 20^th of May. In 2020-2021, the beginning of bud break was observed from April, 18th to April, 25^th; the beginning of flowering ‒ from May, 8^th to May, 13th. The beginning of ripening of berries in 2020 fell on the period from July, 14^th to July, 16^th; in 2021 ‒ from July, 6^th to July, 8^th. In 2022, the beginning of bud break was recorded from April, 26th to May, 1st, the beginning of flowering ‒ from May, 16th to May, 18th, the beginning of ripening ‒ from July, 16^th to July, 18th. The shift in the dates of the onset of the main phases of vegetation can reach 10 days from the average long-term values. Preliminary results of a collection study of varieties of Chelyabinsk breeding have been obtained. On average, over 3 years of fruiting, the highest productivity was noted on the varieties Jota and Ogni Urala ‒ 1.07 kg/bush. The highest mass of berries was noted in the varieties Kapitalina, Jota, Il'inka, Beta: average ‒ 0.6...0.7 g, maximum ‒ 1.0...2.0 g. The varieties Jota, Al'fa, Alaya zor'ka, Kapitalina, Luchezarnaya, Beta, Epsilon differed in dessert taste. The highest content of antioxidants in red currant berries was found in varieties Luchezarnaya, Il'inka, Epsilon ‒ 10.99…12.65 mmol/dm3 eq. 

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