Assessment of resistance against late bligth of potato on leaves of newly created and original selection material of potato

Abstract

Goal. To assess the newly created selection material of potato, hybrids, and varieties of domestic and foreign selections of the parent nursery of the laboratory of selection of the Institute of potato of NAAS on the resistance of the aboveground part of plants to late blight, and to identify relatively resistant to pathogens samples. Methods. Laboratory evaluation using artificial infection of separated leaves in an incubation chamber. Results. Hybrid combinations with a relatively high percentage of yield of relatively stable breeding samples, created with the participation of multi-species hybrids, varieties of domestic and foreign selections, were identified. The average point of resistance to late blight on the leaves in combinations was 1–8 points. The highest (8 points) indicator of the leading feature is characterized by combinations: Balabai/Yavir, Barylchykha/Bahriana, Verdi/Syngaivka, Verdi/Sluch, Irbitskyi/Veresivka, P.10.34/4/Fausta, P.10.42/7/Fausta, Pliushka/Podoliya , 93.2631/Siverianka, 04.115/39/Partner. The frequency of detection of individual components of crossing among the newly created selection material with a relatively high manifestation of resistance against the pathogen of late blight was in the range of 100–10%. In the origin of such samples, the largest share is the varieties: as the parent component — Fausta, Dina, Krasnaia Zaria, Poliska Yuvileina, Radych — 100%. Slightly less: Pirol — 80%, Svitanok Kyivskyi — 80, Chernihivska Rannia — 72.7, Verdi — 70, Verkhovyna, Sviatkova — 66.7, Syngaivka — 66, Letana — 63.6, Kamenskyi, Perlyna, Yavir — 60%.The maximum share (100%) in the selection of relatively stable samples is provided among the following parent forms varieties: Akcent, Barbara, Zelenyi Hai, Mozart, Radych, Chernihivska Rannia. Slightly less: Syngaivka — 83.3%, Dovira — 81.3, Veresivka — 76.9, Bazys, Verkhovyna, Zdabytak — 66.7%. Conclusions. The possibility is proved of creating by the method of interspecific hybridization of selected samples of potato with relatively high resistance against late blight on the leaves. The variety of potato Rodynna with relatively high resistance against late blight was created in the laboratory of selection of the Institute of potato of NAAS. It was entered in the State Register of plant varieties suitable for growing in Ukraine.