study of two crown and root gall resistant rootstocks hybrids traits

Document Type : Research

Authors

1 Member of scientific board Seed and plant Improvement division, West Azarbayjan Research and Education Center and Natural Resource, Agricultural Research, Education and Extension Organization (AREEO), Urmia, Iran

2 Qazvin Agriculture and natural Resources research and education center

3 Deputy of

4 Korasan Razavi Agriculture and natural Resources research and education center

5 Kohgolieh va Boier ahmad Agriculture and natural Resources research and education center

6 Kurdestan Agriculture and natural Resources research and education center

Abstract

Crown and root gall is the most common bacterial disease of vineyards in Iran, and commercial cultivars of Vinifera sp. (European cultivars) are highly susceptible to it. A 14- year breeding program was carried out in to produce disease-resistant rootstocks that have also tolerance to high lime in soil. A hybridization was performed between 4 parents of American species (male parents) and 4 parents of vinifera sp (female parents), and finally 16 hybrids were created. After studies in several stages, two hybrids were selected and named in 2020 as Nazemieh (V. vinifera cv. 'Jighjigha'× Riparia Gloire) and Spota (V. vinifera cv. 'Gharaozum' × Kober 5BB). High resistance to Agrobacterium vitis causing crown and root disease, tolerance to soil lime up to 30%, and tolerance to cold (up to -21ºC) were determined in both rootstocks. Furthermore, the results showed that Nazmieh induced more vegetative growth on scion/ However, Spota caused a dwarf feature. In assessing the compatibility of these rootstocks, high graft susceptibility (86%), faster fruiting induction, the increased yield (1.5 times compared to the control) and of the improved fruit quality of the grafted cultivars on these rootstocks were observed in native cultivars in six regions of viticulture regions in Iran.

Keywords

Research in Horticultural Sciences
Volume 1, Issue 1
September 2022
Pages 41-56

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