FRAJLA AND DIONIS, NEW GRAPE VARIETIES FOR ECOLOGIAL GROWING
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Abstract
Reducing pesticide use in vineyard production in order to preserve the environment and human health is possible by growing cultivars tolerant or resistant to fungal diseases. At the experimental field of University of Novi Sad, Faculty of Agriculture in Sremski Karlovci, during last four decades, several cycles of interspecies crossings were made, putting emphases on quality improvement and resistance maintenance. The research results of the last generation of new wine grape varieties Frajla and Dionis are presented. Using molecular markers, it was found that Frajla variety carries Rpv3 and Ren3 genes, while the variety Dionis carries Rpv3 and Rpv 12 genes. The presence of the genes Rpv3 and Rpv 12, (downy mildew resistance) and Ren3 (powdery mildew resistance), were confirmed in the field conditions. Biological and production characteristics of new varieties were observed during the period 2012-2016. Frajla (Vertes csillaga x Petra) is an early ripening variety (30. 08.), solid yield, with high sugar content in the must, and enough acids to produce high quality white wine, with discreet muscat aroma. Variety Dionis (Cabernet franc E11 x Panonia), is a late ripening (01. 10.), with solid productivity, accumulates high content of sugar in the must. Dionis demonstrated a high degree of tolerance to fungal diseases, resistance to frost and excellent quality of red wines. New varieties are recommended for ecological viticulture and winemaking.
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