Keywords
Abstract
Among grape diseases, the greatest harm to the crops is caused by mildew. The cultivation of mildew-resistant grape varieties is one of the most effective methods of disease control, which will allow increase the profitability of production, improve the ecology of ampelocenosis and food safety of final products. The process of creating genotypes resistant to Plasmopara viticola is based on the use of international grape genetic resources. Local grape varieties of Crimea gathered in the Common Use Center Ampelographic Collection Magarach (CUC AC Magarach) are of interest for breeding as genotypes with a number of valuable
economic characteristics and a high degree of ecological adaptability to the conditions of the region. The aim of the work was to identify sources of resistance to Plasmopara viticola based on assessing the susceptibility of local grape varieties of Crimea in AC Magarach to mildew during the years of maximum development of the disease for the task-oriented and effective use of the grape gene pool in the selection of new genotypes, maximally adapted to stress factors of biosphere. The object of the study consisted of 72 local grape varieties of AC Magarach. The assessment of samples by resistance to mildew was carried out during years of
maximum disease development (1998, 2001 and 2015) according to the methodology of the International Organization of Vine and wine (OIV) “Codes des caracteres descriptifs des varieties et especes de Vitis”. As a result of comparative resistance analysis of local grape varieties to mildew, the sources of relative resistance to desease were identified in ‘Yanykh Yakoub’, ‘Khersonesskii’ and ‘Krona’ varieties of winemaking direction; ‘Shabash’, ‘Shabash Krupnoyagodnyi’ and ‘Manzhil Al’ varieties of table direction; ‘Emir weiss’, ‘Solnechnaya dolina 58’ and ‘Kutlakskii Chernyi’ varieties of all-purpose direction. The obtained results will contribute to
the targeted selection of base materials in breeding programs and effective use of grape genetic resources in scientific research.