Journal of Food, Agriculture and Environment

Effect of different techniques on walnut (J. regia L.) grafting

Author(s):

Asghar Soleimani ^1*, Vali Rabiei ¹, Darab Hassani ²

Recieved Date: 2009-12-18, Accepted Date: 2010-03-28

Abstract:

Most of walnut production in Iran comes from sexually propagated trees what leads to low fruit quality in size, color and other characteristics, thus, its substitution with a proper grafting method is necessary. This study was carried out to determine a proper technique for grafting walnut cultivars in winter. For this purpose in March 2008, two hot callusing systems including hot callusing in room (HCR) and modified hot callusing cable (MHCC), and two grafting methods (omega and saddle) were used for table grafting four walnut cultivars and native genotypes (Hartley, Chandler, Z63 and Z30). Grafting was carried out on two years old Persian walnut rootstocks and the grafted plants were kept at 27°C and 95% RH. Graft success and scion growth were recorded for each treatments one month after grafting and the succeeded grafts were potted. Percentage of loss in the succeeded grafts was also recorded at the end of growth season. The results showed that application of MHCC system resulted in the highest graft success (63.3%) and lower graft losses (28.1%) comparing with HCR system with 56.7% success and 36.4% losses. Based on the results, graft success was higher using saddle method than omega method (87.7% and 38.3%, respectively). Also, graft loss was lower with saddle method than omega method (19% and 45.5%, respectively). The interaction of hot callusing system and grafting method were statistically different for graft success and losses. Highest grafting success (87.52%) and lowest loss (13.4%) was obtained using MHCC system with saddle method. Comparison of grafting success in different cultivars showed that the highest graft success and the lowest losses (70.8% and 22.2%, respectively) were detected in Chandler cultivar.

Keywords:

Walnut, heating system, grafting method, graft success, graft losses

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Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 2
Category: Agriculture
Pages: 544-546

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