Journal of Food, Agriculture and Environment

Exploration of potato cultivar resistant to the major fungal pathogen on potato wilting disease in Iran

Author(s):

Hossein Saremi ¹, Mohammad E. Amiri ²

Recieved Date: 2009-11-27, Accepted Date: 2010-04-10

Abstract:

Three fungal pathogens severely infected both tuber and foliage of potatoes which resulted in considerable yield losses in northwest Iran. The susceptibility of potatoes was significantly influenced by cultivars and regions, where the experiment was carried out. Initially, 300 infected samples (tuber and foliage) were collected from various potato grown regions (Qazvin, Zanjan and East Azarbyjan provinces) and cultured on media for isolation of pathogens. The high prevalence fungal pathogens were Fusarium oxysporum (39%), Verticillium species (31%) and Alternaria solani (28%) in the regions. Wilting resistance for 10 international potato cultivars (Marfona, Agria, Sante, Atlantic, Raja, Ladytosiet, Shannon, Cyclone and Lady-Claire) was investigated by inoculation (10⁵ spore suspension) of three isolated pathogens (Fusarium oxysporum, Verticillium species, Alternaria solani) in the natural infected fields. The most wilting resistant cultivar was Spirit, which showed 78% healthy plants, while Lady-Claire was the most susceptible cultivar, with only 11% non-infected plants and ‘Atlantic’ was moderate resistant with 53% healthy plants. The average yield of ‘Spirit’ was more than two times (27.63 kg/10 m²) higher than that of ‘Lady-Claire’ (11.03 kg/10 m²).

Keywords:

Potato, resistant, ‘Spirit’, Fusarium, Verticillium, Alternaria

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Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 2
Category: Agriculture
Pages: 821-826

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