Scientific Journal of KubSAU

The article presents the results of the studies of 11 varieties cultivated in the eastern region of South Coast wine-growing zone of Crimea (planting of "Solnechnaja Dolina ", near Sudak mountain) in the area of their natural growing, where was formed the gene pool of grapes for a long time. As a result, the three-year (2010-2012) study found that the majority of indigenous varieties had small number of fruitbearing shoots in the bush: the varieties with colored berry - 53,3-73,3%, in white-berry - 46,6-75,9% except Shabash variety - 79.9%. We have identified the most productive varieties which were Dzhevat kara (62.2 t / ha), Kokur Beliy (48.9 t / ha), Kapselsky Beliy (44.4 t / ha), and varieties with female type of flower: Kefesiya, Ekim kara, Kock pandas, Sary pandas and Crona gave not high yield: 22.2; 22.2; 24.4; 28.9 and 28.9 t / ha. On the strength of growth, productivity and the accumulation of sugars in the juice of berries, we picked out varieties of Dzhevat kara, Crona, Kapselsky beliy. According to the main economic indicators, it turned out that the most profitable varieties are Dzhevat Kara, Kokur beliy and Kapselsky beliy. Hence, these varieties in conditions of the Crimea have much greater prospect of reproduction and development of production

Peculiarities of breeding oidium-resistant genotypes in crossing Crimea autochthonous grape varieties with complex interspecific hybrids were studied. Twentytwo populations consisting of 1323 seedlings were analyzed over a period of 2008-2014. The highest oidium resistance was registered in the progeny of the cross Khersonesskii х ЖС 26-205 (6.8 points), and the average estimate of oidium resistance across all the study populations was higher than that of the initial autochthonous grapes of the Crimea. The level of hypothetical heterosis in the majority of the study populations indicates that, on the whole, the hybrid seedlings possess a higher oidium resistance relative to the initial Crimea autochthonous grapes. The highest breeding value was associated with cross combinations having the complex interspecific hybrids Muscat JIM, Spartanets Magaracha and Magarach 31-77-10 in their pedigrees. The cross combination Muscat JIM х Shabash was the most efficient, yielding 10.7 per cent of oidium-resistant seedlings. It was reliably established that a high level of the genotypically determined inheritance of oidium resistance is found in crosses with the participation of the interspecific forms Magarach № 31-77-10 and Muscat JIM (female parents) and Spartanets Magaracha and Tsitronnyi Magaracha (male parents). The expediency of this direction of breeding research was proved