Development of Sphaerotheca resistant black currant hybrid collection with the use of varietal samples of Oryol selection
The paper presents the results for application of the following black currant varietal samples (Orel breeding) Gamma, Gracia, Yershistaya, Iskusheniye, Kipiana, Lentyai, Monisto, Orlovsky vals, Orlovskaya serenada, Chudnoye mgnoven'ye, 1085-4-111, 1448-6-49, 1511-4-68, 1513-10-172, 3190-44-64, 3206-41-112, 3330-49-129 and 3339-49-216 in the black currant breeding program of I.V. Michurin Federal Scientific Center (Michurinsk). It was found that the maximum yield of Sphaerotheca resistant seedlings was obtained using sources and donors of immunity to Sphaerotheca (Sph3 gene) BC5 - BC6 from Ribes glutinosum Benth. The seedlings 3190-44-64, 3330-49-129 and 3339-49-216 are promising for hybridization efforts both as maternal original forms and as paternal ones. When cultivated in a hybrid plot, the Sphaerotheca resistance was stably demonstrated by the seedlings obtained as maternal original forms 1085-4-111 and 1448-6-49 and paternal ones 1448-6-49 and 1513-10-172. According to long term investigations 87 promising seedlings were singled out from our hybrid pool, some of them were selected as elite seedlings by the complex of high economically important characters. These were the following seedlings 28-1-19, 30-3-79 (in 2018) and 27-3-25 (2019).