ISHS Acta Horticulturae 538: Eucarpia symposium on Fruit Breeding and Genetics
REGENERATION OF ADULT MALUS ROOTSTOCKS |
| Authors: | B. Feuerhahn, H.H. Jesch |
| Keywords: | genetic resources, in vitro, root cutting, grafting |
| Abstract:
In Brandenburg (Germany) numerous extensively used fruit orchards are growing beside the roads. Their high age (planted in 1804) leads to the assumption that they adapted very well to the local conditions. The vitality of the cultivar and their root is extraordinary. The studies at Humboldt University were aimed at reproducing the specific combinations of cultivars and rootstocks, which made the growth of the trees at these locations possible. In its first step, the experiment required the regeneration of the rootstock. It was possible to regenerate eight local Malus-rootstocks. They will serve as a genetic pool and three of them will be given to nurseries for further propagation. They are new rootstocks for extensively used fruit orchards. Different conventional (root cuttings, graftings, cutting propagation) and in vitro methods (regeneration through root pieces and shoots) were tested. The success of the regeneration depends on the regeneration method and the genotype. The surplus shoots of root cuttings served as basis for all other regeneration methods. In vitro it was possible to produce the highest number of shoots in a short time. The next years will show whether there are differences between these rootstocks and the conventionally regenerated ones. It is possible to use these methods of regeneration for rootstocks of other species. | |
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