Clonal Selection of Autochthonous Grape Varieties in Badacsony, Hungary

• DOI: 10.20944/preprints202306.2197.v1
• Publication Date: 2023-07-03T01:09:08Z
• Authors: Gizella Jahnke; Barna Szőke; Tamás Deák; Róbert Oláh; Krisztina Oláh; Gyöngyi Knolmajer...; Csaba Németh; Diána Ágnes Nyitr...
• Keywords: Wine grape; Botrytis

In the case of indigenous grapevine varieties, aim clonal selection is twofold: to improve their technological cultivation problem while preserving varietal character. As sensitivity perennial crops climate change becomes more pronounced, selection, which already very time-consuming for woody crops, may take even longer. Badacsony, breeding ‘Kéknyelű’ and ‘Juhfark’ varieties was started in early 2000s. The mentioned above technology poor fertility (functionally female-flowered variety), high susceptibility grey rot (Botrytis). Based on 11 years data significant difference yield between clone B.2. base variety found. this comparison year clusters also gave different values, as belonging cluster 1 ’Kéknyelű’ yielded than another year. Both clones matured with significantly lower pH compared variety. ‘Kéknyelű' renowned distinctive character its wine, said be acidic. Given acidic nature wine expected increase must degrees due change, these distinctions beneficial future. Daily meteorological parameters were recorded under study, indexes calculated both phenological periods. classified into 3 harvest analyzed within each cluster. 'Kéknyelű' our results revealed differences vintage However, B.1 demonstrated distinct KMW values. 'Kéknyelű’ have produced a substantially higher incidence Botrytis infection 2 years. only showed statistically ‘Juhfark’. It intriguing that most years, rotting rate clones, especially when overall quite low. Our highlighted year-round two studied difficulties selection.