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BELAROSA -Mise au point d'un test en routine d'identification de la sensibilité/résistance à la maladie des taches noires de variétés de rosier en vue de leur commercialisation

Abstract : The fungus Diplocarpon rosaeis the causal agent of black spot disease on rose, a widespread and devastating disease in the outdoor landscape. In this study, a collection of 77 monoconidial fungal strains collected on cultivated roses(50 strains from Europe and Asia) and wild roses (27 strains from Kazakhstan) was established.Twostrains of D. rosaewere sequenced by using Illumina® technology. Based on nucleotide polymorphism of the two fungal strains, 27 polymorphic microsatellite markers were identified. Polymorphism analysis of the 77 strains revealed a strong genetic differentiation between strains from cultivated roses and those from wild roses. A pathogenicity assay in controlled conditions (greenhouse) was developed using 10 French fungal strains and 19 rose cultivars. Using this assay, new rose cultivars were evaluated for their resistance against these 10 fungal strains. Good correlation observed between resistance scoring in greenhouse conditions and in field indicates that pathogenicity assays in controlled conditions could be very useful in the near future to rapidly characterise the resistance of new rose varieties to black spot disease
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https://hal.univ-angers.fr/hal-03202586
Contributor : Laurence Hibrand-Saint Oyant <>
Submitted on : Tuesday, April 20, 2021 - 9:22:27 AM
Last modification on : Tuesday, April 27, 2021 - 3:21:50 AM
Long-term archiving on: : Wednesday, July 21, 2021 - 6:14:15 PM

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  • HAL Id : hal-03202586, version 1

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Vanessa Soufflet-Freslon, Caroline Bonneau, Bruno Le Cam, Hibrand-Saint Oyant. BELAROSA -Mise au point d'un test en routine d'identification de la sensibilité/résistance à la maladie des taches noires de variétés de rosier en vue de leur commercialisation. Innovations Agronomiques, INRAE, 2021, pp.96-104. ⟨hal-03202586⟩

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