RECENT RESULTS OF GRAPE ROOTSTOCK BREEDING PROGRAM OF THE GEORGIKON FACULTY
Grapevine rootstock breeding commenced in the 1970s at the Georgikon Faculty of Pannon University by utilizing genetic resources from a collection of more than 110 rootstock genotypes. The main aim was to develop highly lime tolerant rootstocks, because about half of Hungarys grape growing regions suffer from lime-induced iron chlorosis. The lime content in some of these soils even precludes the use of the Teleki rootstocks. Ease of propagation was also selected for. Georgikon 28 one of the main/first results of these early efforts. This rootstock has an extremely high lime tolerance and it is easy to propagate, but because of its V. vinifera genetic background its phylloxera resistance is only moderate and needs to be strengthened. As the program progressed drought tolerance was also added to the breeding goals. Seedling populations were established in the mid-1990s after parents had been characterized and selected; their evaluation still continues. The drought tolerance of Georgikon 28 × Börner seedlings is discussed in detail. Field performance of this seedling population was evaluated in a rootstock mother block and in a trial vineyard using standard rootstock cultivars as controls. Results presented are from 2011 and 2012. Both growing season were extremely dry. Harvested cane production in a rootstock mother block was used as an easy and efficient indicator of rootstock productivity to select promising candidates among the seedlings. The performance of grafted plants was judged by the fruit quality (number of clusters, berry size, yield per stock, berry weight, sugar content, acidity) and pruning weight in the vineyard. The most promising genotypes produced higher yield, with better quality in 2012 than the same scions grafted on 1103 Paulsen, Fercal or Georgikon 28 and their cane production were satisfactory as well.
Kocsis, L., Lajterné, B.F., Németh , GY. and Kocsisné, G.M. 2014. RECENT RESULTS OF GRAPE ROOTSTOCK BREEDING PROGRAM OF THE GEORGIKON FACULTY . Acta Hort. (ISHS) 1045:109-115
drought, lime tolerance, propagation, genotypes, quality