Effects of Rootstock and Cultivar on Propagation of

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Abstract

A significant increase in the area under cultivation of walnut has been occurred during recent years, the propagation was done using the sexual propagation. One of the difficulties is obliging to use this method, was the low success in propagation by grafting methods. This study was done to evaluate the effects of rootstocks and cultivars on graft take of walnut. For this purpose, the seeds of Serr cultivar and Z63 genotype, after stratification, were planted in pots and maintained in greenhouse at 25° C. Three months after germination of seeds, morphological characters of canopy (after removal of the leaves) and roots were recorded on each rootstock (the offsprings of two cultivars) and then seedlings were grafted with scions of Hartley, Chandler, Z63 and Z30 cultivars and genotypes using hypocotyle method. The grafted plants were kept in greenhouse in 26° C and 90-95% relative humidity for one month, and grafting success in different treatment combinions, were studied. The results showed that offspring of Serr cultivar were more vigorous and significantly different from vegetative vigour of the offspring of Z63. The graft take was also higher on offspring of Serr (65.8%) in comparison with Z63 (46.7%). The graft take was also significantly different among the cultivars. Chandler and Z30 with 80% and 36.7% showed the highest and lowest grafting success respectively. There was also an interaction effect considering both factors (rootstocks and scions) so that all cultivars except Z63, showed better results on Serr rootstoks.

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Seed and Plant Production Journal
Volume 25, Issue 1
May 2009
Pages 93-101

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