Resistance of raspberry caltivars to temperature stress factors of the winter period

Abstract

The results of researches of winter hardiness cultivars and selected forms of raspberry in the field and laboratory conditions have been presented. The study was conducted in FSBSI All-Russia STIHNG and its Kokino Base Station (Bryansk region). The objects of research were 20 cultivars and 10 selected forms of raspberry of various genetic-geographical origin. The main purpose of the work was to study the resistance of cultivars and selected forms of raspberry to temperature stress factors of the winter period and the identification of the most winter-hardy genotypes. As a result, it was established that the cultivars Peresvet, Balzam, Beglyanka, Rubin Bryanski and nine selected forms showed high field winter hardiness. When modeling damaging winter factors, it was revealed, that the cultivars Gusar, Lazarevskaya, Volnitsa, Meteor and selected forms 32-16-1, 1-15-1, 1-2-2, 6-12-2 well tolerated frost-35C in the middle of winter. The cultivars Gusar, Meteor, Volnitsa and selected forms 32-16-1, 1-4-2, 1-15-1, 1-2-2, 2-12-1 distinguished by reliable resistance to component III of winter hardiness. Among the studied raspberry assortment, the genotypes with a high level of bud resistance to IV component of winter hardiness were not revealed.