Archives of Phytopathology and Plant Protection (2013) 46, 1864-1873

Mehdi Nasr Esfahani, Mansoureh Hosseini, Abbas Nasehi and Elham Golkhandan (2013)
Screening of onion seed sets for resistance against new Iranian isolates of Fusarium oxysporum f. sp. cepae
Archives of Phytopathology and Plant Protection 46 (15), 1864-1873
Abstract: Root and basal rot disease (RBR) of onion, Fusarium oxysporum f. sp. cepa (FOC), is one of the most important diseases, which cause tremendous losses in onion-growing areas worldwide. In this survey, various onion genotypes, including eight main and dominant Iranian seed sets and two exotic ones, were tested against FOC incidence in greenhouse and field conditions of various growing stages. The incidence of the RBR was determined at three stages, such as early, flowering and seed-setting stages, on the basis of disease severity. The genotypes reacted differentially to FOC within and between various stages with a very high significant level. The genotypes were classified in five scoring scales, accordingly. Highly infected ones tended to be associated with the highest mean scores of 75-100% severity and the least infected genotypes had the lowest scores of 0-10%. Moreover, the examined genotypes were ranked from 1 to 10 according to their markedly differing reactions to FOC at various stages. Variance and cluster analysis also showed similar results among the genotypes with various levels of infections. There was a direct, positive and enhancing correlation for every genotype to infection as the growing stages were reaching to the maturing stage.
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Link to article at publishers website
Database assignments for author(s): M. Nasr Esfahani, Abbas Nasehi

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Fusarium oxysporum f.sp. cepae	Onion/garlic/leek (Allium)	Iran
	Fusarium oxysporum