DISTINGUISHING OF THE GRAPEVINE CULTIVARS ´PICOLIT´ AND ´KÉKNYELŰ´ WITH THE HELP OF IZOENZYME ANALYSES

The name of the grapevine cultivar ‘Kéknyelű’ has become inseparable from the name of the Badacsony vine region, it’s fame is well known beyond our frontier as well. ‘Kéknyelű has a functional female flower, and because of it, the pollen is sterile. In the Internet, we find on the Vitis International Variety Catalogue site (http://www.genres.de/idb/vitis/), the ‘Kéknyelű’, as the synonym of the Italian grapevine cultivar ‘Picolit’. In the morphological description, we find that this cultivar has – as the ‘Kéknyelű’ – functional female flowers, but the shape of the mature leaves of the two cultivars differs. Vertical poliacrylamide-gel electrophoresis was used for the investigation of catechol-oxidase (CO) and acid phosphatase (AcP). The results of the isoenzymatic analyses confirmed, that this two cultivars are different.