Abstract

A collection of 146 varieties of potatoes were studied in 2015 to 2018 to determine the varieties that provide the highest yield of starch per unit area in the Chelyabinsk region. It was found that the total yield of starch depends more on the yield of potatoes than on the starch content in tubers. Productivity increases and the starch content in tubers decreases under favorable conditions. In conditions of moisture deficit, on the contrary, an increase in starchiness of tubers was noted, and their productivity was significantly reduced. Seven varieties with a high yield of starch per unit area (t/ha) identified were Il’inskiy (6.87), Belosnezhka (6.75), Terra-1 (6.66), Bashkirskiy (6.12), Vemer (6.04), Valeriy (6.02) and Svitanok kiyevskiy (6.01). The varieties which increased the starch collection from 5.00 to 5.98 t/ha were Spiridon, Dunyasha, Artom, Yagodnyy 19, Okolitsa, Slavyanka, Panyanka, Kamenskiy, Yermak, Zhuravinka, Strumok, Sinetsvet, Nikulinskiy, Otrada, Zorachka, Kolobok, Zhigulevskiy, Oredezhskiy, Sentyabr’, Simfoniya, Osen’, Zekura, Nikitinskiy ranniy, Briz, Galaktika, Nayada, Spiridon, Dunyasha, Artom, Yagodnyy 19, Okolitsa, Slavyanka, Panyanka, Kamenskiy, Yermak, Zhuravinka, Strumok, Sinetsvet, Nikulinskiy, Otrada, Zorachka, Kolobok, Zhigulevskiy, Oredezhskiy, Sentyabr’, Simfoniya, Osen’, Zekura, Nikitinskiy ranniy, Briz, Galaktika, Nayada as well as samples of the Chelyabinsk selection viz. 05.60.24, 2097/16 (Sharap), 05.62.13, 06-547.8 and 06-1547-11. To increase starch production in Chelyabinsk region, it is necessary to use potato varieties zoned in the Ural region viz. Nayada, Bashkirskiy, Kamenskiy, Nikulinskiy, Oredezhskiy, Svitanok kiyevskiy and Spiridon. For inclusion in the Register of selection achievements approved for use in the Ural region, the following varieties of Chelyabinsk selection were found promising: 2097/16 (Sharap), 05.60.24, 05.62.13, 06-547.8, 06-1547-11, Gubernator and 06.18.7, as well as varieties of other selection: Terra-1, Valeriy, Yagodnyy 19, Artom, Dunyasha, Okolitsa, Panyanka and Strumok. The varieties with a low starch content in tubers which are suitable for dietary nutrition were Zhukovskiy ranniy (11.9 %), Karatop (12.2 %), Impala (12.3 %), Skarlett (12.5 %), Obelisk (13.0 %), Vesna (13.1 %), Nikita (13.4 %), Resurs (13.4 %) and Gubernator (12.9 %).