Résumés
Abstract
Cytoplasmically-transmissible viral double-stranded RNAs of the genus Hypovirus cause reduced virulence (hypovirulence) in the chestnut blight fungus Cryphonectria parasitica. Biological control of this fungal disease is done by inoculating selected artificial hypovirulent strains of C. parasitica in the wounds of attacked chestnut trees and is followed by testing the transmissibility of dsRNA to C. parasitica isolates affecting these trees. Here we present a modified protocol of isolation and detection of dsRNA. The proposed procedure requires smaller amounts of fungal material for dsRNA detection and uses less reagents, thus resulting in appreciable cost savings.
Key words:
- Cryphonectria parasitica,
- dsRNA isolation protocol
Résumé
Les ARN double brin (ARNdb) viraux du genre Hypovirus à transmission cytoplasmique réduisent la virulence (hypovirulence) du Cryphonectria parasitica, le champignon responsable de la brûlure du châtaigner. La lutte biologique contre cette maladie fongique se fait par l'inoculation, dans des blessures de châtaigniers atteints, de souches choisies de C. parasitica artificiellement hypovirulentes, suivie de l'analyse de la transmissibilité des ARNdb aux isolats de C. parasitica qui affectent ces arbres. Nous présentons ici un protocole modifié d'isolement et de détection d'ARNdb. La procédure proposée requiert une plus petite quantité de matériel fongique pour la détection d'ARNdb et demande moins de réactifs; il en découle donc des économies appréciables.
Mots clés:
- Cryphonectria parasitica,
- protocole d’isolement d’ARN double brin
Parties annexes
References
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10.7202/011710ar