Articles
PROPAGATION ABILITY OF SELECTED WALNUT HYBRIDS (JUGLANS REGIA L. × J. NIGRA L.)
Article number
705_50
Pages
359 – 364
Language
English
Abstract
Research on the possibility for walnut (J. regia) to be exploited as tree species suitable for forestry plantations, recently had a lot of impulses from the Italian Agricultural Ministry and, specifically, with the promotion of the Riselvitalia project.
In the framework of the above mentioned project the Istituto Sperimentale per la Selvicoltura of Arezzo has developed a research aimed at the exploitation of some selections of a J. nigra population, identified in North Italy and characterized by a spontaneous inter-specific crossing ability with J. regia. The Persian walnut grows slowly with respect to J. nigra that, on the other hand, produces lower quality wood comparing to J. regia. Because of the difficulty in Juglans propagation, the Istituto Sperimentale per la Frutticoltura of Rome, due to its specific knowledge on grafting research of Juglans spp, was involved in the project.
In the winter 2001 wood material was collected from the mother trees to test their propagating ability.
Two grafting techniques were adopted: the Hot callusing in the winter and the Top grafting in the spring-summer.
Wood-scion material collected from 20 (of the 23 selections) were grafted on walnut seedlings populations of Bleggiana, Monti Lessini, Val Maira and Val Parma. Results were influenced by the poor phytosanitary condition of the mother plants and by the genotypes.
In the framework of the above mentioned project the Istituto Sperimentale per la Selvicoltura of Arezzo has developed a research aimed at the exploitation of some selections of a J. nigra population, identified in North Italy and characterized by a spontaneous inter-specific crossing ability with J. regia. The Persian walnut grows slowly with respect to J. nigra that, on the other hand, produces lower quality wood comparing to J. regia. Because of the difficulty in Juglans propagation, the Istituto Sperimentale per la Frutticoltura of Rome, due to its specific knowledge on grafting research of Juglans spp, was involved in the project.
In the winter 2001 wood material was collected from the mother trees to test their propagating ability.
Two grafting techniques were adopted: the Hot callusing in the winter and the Top grafting in the spring-summer.
Wood-scion material collected from 20 (of the 23 selections) were grafted on walnut seedlings populations of Bleggiana, Monti Lessini, Val Maira and Val Parma. Results were influenced by the poor phytosanitary condition of the mother plants and by the genotypes.
Publication
Authors
D. Avanzato, F. Ducci, F. Gorian, L. Gui, A. Major, E.M. Malvolti, G. Mezzalira, P. Pollegioni, R. Proietti
Keywords
propagation, walnut hybrid, hot callusing, top-grafting
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