Varieties of raspberries (<i>Rubus idaeus</i> L.) introduced in Central Yakutia

Abstract

The results of studying biological properties and productivity of introduced varieties of common raspberry are presented. Objects of research were varieties of common raspberries ( Rubus idaeus L.) Arochnaya, Prelest, Persik, Novost Kuzmina, Marlboro, Vislukha, Kaliningradskaya. Variety Novost Kuzmina adapted to local conditions was used as a control. The studies were carried out in 2016–2018 in a fruit and berry garden. Band planting pattern was used 3.0 × 0.5 m. Agrotechnology applied is generally accepted in the area with bending and heeling in shoots with a layer of earth or humus in late autumn. The study was carried out according to the generally accepted method. On average, over the years during the study period, raspberry varieties entered the phase of the beginning of the growing season in early – mid-May (May 6–16) with a sum of positive temperatures of 79.3–121.3º. The earliest budding time was observed for Marlboro variety. Raspberry flowering began in the third part of June, 39–44 days after the start of the growing season. The flowering period of the studied varieties is extended. Raspberries ripened in late July. The end of growth was not observed in any varieties. As a result of the collection varietal study of raspberries, a high-yielding variety Prelest (3.6 t/ha) was identified. Varieties Arochnaya and Persik were distinguished as yielding large-sized fruit (105.5–106.8 g/100 berries). These varieties are recommended for cultivation on the personal plots of land, farms and other agricultural enterprises in Central Yakutia and for the use in breeding work as sources of high productivity and large-sized fruit.