Host Range and Genetic Characterization of Ditylenchus dipsaci Populations from Eastern Canada

The stem and bulb nematode, Ditylenchus dipsaci, is a plant-parasitic nematode affecting over 500 plant species worldwide. Since 2012, garlic producers from Ontario and Quebec have been particularly affected with economic losses caused by this pest. Reproduction of D. dipsaci on a particular host de...

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Veröffentlicht in:Plant disease. - 1997. - 103(2019), 3 vom: 20. März, Seite 456-460
1. Verfasser: Poirier, Sandra (VerfasserIn)
Weitere Verfasser: Dauphinais, Nathalie, Van Der Heyden, Hervé, Véronneau, Pierre-Yves, Bélair, Guy, Gravel, Valérie, Mimee, Benjamin
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article
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520 |a The stem and bulb nematode, Ditylenchus dipsaci, is a plant-parasitic nematode affecting over 500 plant species worldwide. Since 2012, garlic producers from Ontario and Quebec have been particularly affected with economic losses caused by this pest. Reproduction of D. dipsaci on a particular host depends on its biological race, and races are unknown for these populations from eastern Canada. As a polyphagous pest, D. dipsaci can possibly be a threat and have negative impact on many crops grown in Quebec, such as field and vegetable crops (e.g., onion). In this study, the host range of four populations of D. dipsaci from Quebec and Ontario was determined in a greenhouse experiment using 11 crops. Garlic, onion, and green onion showed high susceptibility to the nematode, whereas reproduction on potato was poor. No reproduction was observed on corn, soybean, barley, alfalfa, mustard, carrot, and lettuce. These crops could therefore be used as rotational crops in a control program. Thirty-two populations of D. dipsaci were also genetically characterized using genotyping-by-sequencing. The comparison of allele frequencies at 481 loci showed that most of the populations had a genotype similar to a reference population from northern Ontario. However, a sample from eastern Quebec exhibited a distinct genotype and will require further phenotyping in a greenhouse to preclude the possibility of a different race 
650 4 |a Journal Article 
700 1 |a Dauphinais, Nathalie  |e verfasserin  |4 aut 
700 1 |a Van Der Heyden, Hervé  |e verfasserin  |4 aut 
700 1 |a Véronneau, Pierre-Yves  |e verfasserin  |4 aut 
700 1 |a Bélair, Guy  |e verfasserin  |4 aut 
700 1 |a Gravel, Valérie  |e verfasserin  |4 aut 
700 1 |a Mimee, Benjamin  |e verfasserin  |4 aut 
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