Articles
COMPARISON OF SOME PROMISING IRANIAN WALNUT CLONES AND FOREIGN VARIETIES
Article number
544_5
Pages
51 – 59
Language
Abstract
Due to recent policy in walnut development program in Iran and also to obtain new and suitable varieties, this research was conducted to determine and recommend the best varieties and new promising clones to the growers as soon as possible.
This study was done to compare 8 foreign commercial varieties from France and California (through FAO) with 7 promising Iranian walnut clones, selected from 250 superior Iranian genotypes in a previous research done in 1984-1988. This study was done in an alpha lattice design on a walnut orchard at the SPII Horticulture Dept.Karaj from 1994 to1998. Preliminary results on 5 year-old trees are as follows :
1- In general, most young grafted trees are sensitive to freezing cold. Some parts of the crown trees as current shoots and some parts of their arms have been injured and died back. The most sensitive are trees from Vina and Serr cvs., while in the second group are Hartley, Franquette cvs., Z67 and B21 clones.
2-Some Iranian clones, such as Z53 were classified in the earliest leafing class. Ronde the Montignac and Franquette cvs. are in the last leafing group. Clones B21, Z67, K72, Z69 and Serr cv. are located in the mid-early leafing group.
3-The highest yield belongs to Z67 with 2 900 kg/ha., while in the second group are B21, and Pedro cv. with 1 600 and 1 300kg/ha., respectively. These yields were obtained on 5 year-old trees in high density planting system. In this trial the most precocious clone belongs to B21 which started bearing fruit on the second year.
4- The biggest size nuts belong to Z53 and Z60 with 19.4 and 17.5 gr/nut respectively, however in terms of color of kernel and percentage of kernel, Z60 clone was rated top.
5- Under our experimental conditions of relatively dry climate most clones and cultivars have not shown high sensitivity to blight and anthracnose diseases. Only Pedro, Chandler cvs., and Z67 clone have shown little reaction to anthracnose.
6- In another experiment, the quality and yield of G3 and G10 were the highest.
This study was done to compare 8 foreign commercial varieties from France and California (through FAO) with 7 promising Iranian walnut clones, selected from 250 superior Iranian genotypes in a previous research done in 1984-1988. This study was done in an alpha lattice design on a walnut orchard at the SPII Horticulture Dept.Karaj from 1994 to1998. Preliminary results on 5 year-old trees are as follows :
1- In general, most young grafted trees are sensitive to freezing cold. Some parts of the crown trees as current shoots and some parts of their arms have been injured and died back. The most sensitive are trees from Vina and Serr cvs., while in the second group are Hartley, Franquette cvs., Z67 and B21 clones.
2-Some Iranian clones, such as Z53 were classified in the earliest leafing class. Ronde the Montignac and Franquette cvs. are in the last leafing group. Clones B21, Z67, K72, Z69 and Serr cv. are located in the mid-early leafing group.
3-The highest yield belongs to Z67 with 2 900 kg/ha., while in the second group are B21, and Pedro cv. with 1 600 and 1 300kg/ha., respectively. These yields were obtained on 5 year-old trees in high density planting system. In this trial the most precocious clone belongs to B21 which started bearing fruit on the second year.
4- The biggest size nuts belong to Z53 and Z60 with 19.4 and 17.5 gr/nut respectively, however in terms of color of kernel and percentage of kernel, Z60 clone was rated top.
5- Under our experimental conditions of relatively dry climate most clones and cultivars have not shown high sensitivity to blight and anthracnose diseases. Only Pedro, Chandler cvs., and Z67 clone have shown little reaction to anthracnose.
6- In another experiment, the quality and yield of G3 and G10 were the highest.
Publication
Authors
J. Atefi
Keywords
walnut, varieties, Iran
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