N. V. Dergacheva, A. I. Cheremisin, S. V. Sogulyak, I. A. Yakimova, A. M. Elina
Omsk Agrarian Scientific Center, prosp. Koroleva, 26, Omsk, 644012, Russian Federation
Abstract. he studies were conducted in the forest-steppe zone of Western Siberia in 2008–2019 on new table potato varieties, developed at the Omsk Agricultural Centre: Bylina Sibiri (mid-ripening variety, included in the State Register of Breeding Achievements of the Russian Federation in 2018), Triumf (early-ripening variety, 2019), Vecherny Omsk (mid-ripening variety submitted for State variety testing in 2020). The potato varieties were bred in nurseries located in an irrigated crop rotation. Potato was grown using the technology adopted for the zone. Resistance to rhizoctonia (Rhyzoctonia solani Kuhn) and common scab (Streptomyces scabies Thaxter) was assessed against a natural infectious background using a 9-point scale. Affection degree was determined under laboratory conditions on washed tubers. According to the results of multiyear studies, mid-ripening variety Bylina Sibiri and early-ripening variety Triumf showed high resistance to common scab – 7.5 points and 7.1 points, respectively; high resistance to the deep form of rhizoctonia was noted for Vecherny Omsk variety (7.2 points). The variation coefficient characterizing the level of variability of common scab and rhizoctonia symptoms (in the form of sclerotia and deep form) varied from 10% to 23% on average over the years of the study, which corresponded to the average level. For Vecherny Omsk variety, we registered average positive associations between the hydrothermal coefficient (HTC) of August and the affection with common scab (r = 0.534); for Bylina Sibiri and Triumf varieties, we registered average positive associations between the August HTC and the affection with a deep form of rhizoctonia (r = 0.480–0.498). The colonization with R. solani sclerotia increased from 0% to 3.2% with up to 1/4 of the tuber surface affected the next year after planting minitubers in the super-superelite nursery.
Keywords: potato (Solanum tuberosum); variety; trait; disease resistance; common scab (Streptomyces scabies Thaxter); rhizoctonia (Rhyzoctonia solani Kuhn); Western Siberia.
Author Details: N.V. Dergacheva, Cand. Sc. (Agr.), head of laboratory (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); A.I. Cheremisin, Cand.Sc. (Agr.), head of department (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); S.V. Sogulyak, Cand. Sc. (Agr.), leading research fellow; I.A. Yakimova, senior research fellow; A.M. Elina, leading specialist.
For citation: Dergacheva NV, Cheremisin AI, Sogulyak SV, et al. [Resistance of new potato varieties to main diseases in Western Siberia]. Dostizheniya nauki i tekhniki APK. 2020;34(10):62-6. Russian. doi: 10.24411/0235-2451-2020-11009.