Evaluation of introduced grape varieties biomorphological features in the Orenburg region conditions

According to the duration of the growing season in the conditions of the Orenburg Region, a covering crop of grapes of domestic and foreign selection grows, classified as varieties of very early and early ripening. The purpose of the study is to identify introduced table grape varieties in terms of productivity and its components. The objects of the study were 5 varieties of grapes. Planting pattern 3×1.5 m, the formation of bushes is fan-shaped, stemless. As a result of reseach of the studied grape varieties, on average over the years, varieties with strong shoot growth were identified: Kodryanka (196.7 cm), Augustin (197.6 cm), Ruta (214.5 cm). The degree of shoot ripening in the studied grape varieties varies from 73.2 % (Arcadia) to 92.2 % (Krasotka). The largest number of fruit shoots was noted - 64.4 % (Ruta). A large number of bunches were formed in varieties Augustin and Kodryanka (over 15 pieces), they also showed a high fruiting rate. Large berries have been identified in the Ruta (6.1 g) and Arcadia (6.8 g) varieties. Large clusters were recorded, the weight of which ranged from 346.2 (Ruta) to 361.5 g (Arcadia). The highest yield per bush and per hectare was noted in the varieties Ruta (4.5 kg and 99.9 c/ha), Arcadia (4.7 kg and 104.3 c/ha). The studied introduced table grape varieties are productive and valuable for use in breeding, as well as for the industrial production of table grapes in the Orenburg Region.