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ISHS Acta Horticulturae 1139: III Balkan Symposium on Fruit Growing

Development and extension of walnut propagation in Iran

Authors:   K. Vahdati, M. Aalifar
Keywords:   Juglans regia, grafting, budding, micropropagation, topworking
DOI:   10.17660/ActaHortic.2016.1139.80
Abstract:
Persian walnut (Juglans regia L.) is widely grown in Iran, as the center of origin of this tree. Propagation of this species is very difficult compared to other fruit and nut trees. Different types of grafting (epicotyl grafting, side stub grafting, omega grafting, whip and tongue grafting, saddle or V grafting, patch budding, chip budding, shield budding and topworking) and tissue culture (propagation by micro shoots or somatic embryogenesis) techniques have been studied intensively in the last 25 years in Iran. In these studies, effect of grafting type and time under different conditions (greenhouse, outdoor and shade house) on callus quality, graft-take, survival and growth of the scions have been studied. Several experiments have been conducted on optimization of micro-propagation steps such as establishment, proliferation, rooting and acclimatization of walnut. Successful techniques have been taught to the growers and agricultural experts. As a result of these efforts, several walnut grafting nurseries and tissue culture labs have been established which propagate walnut cultivars and rootstocks commercially for local and international markets.

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