Title: Genetic analysis of resistance to the phenylpyrrole fludioxonil and the dicarboximide vinclozolin in Botryotinia fuckeliana (Botrytis cinerea)
Authors : Vignutelli, Alberto
Hilber-Bodmer, Maja
Hilber, Urs
Published in : Mycological Research
Volume(Issue) : 106
Issue : 3
Pages : 329
Pages to: 335
Publisher / Ed. Institution : Elsevier
Issue Date: 2002
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subject (DDC) : 570: Biology
634: Orchards, fruits and forestry
Abstract: This paper describes as a part of the resistance risk assessment, the genetic analyses which were performed to evaluate the resistance risk of the phenylpyrrole fungicide fludioxonil and the implications for cross resistance with the dicarboximide vinclozolin. Cross resistance between dicarboximides and phenylpyrroles, often found in the laboratory, has been extremely rare in the field. Over seven years of monitoring in Switzerland no fludioxonil field resistant isolates were found. Sexual crosses between a fludioxonil field resistant/vinclozolin field resistant strain isolated in France and a sensitive one showed an independent segregation of the resistance to the two fungicides, suggesting that different genes regulate field resistance to fludioxonil and vinclozolin. Sexual crosses between a fludioxonil field resistant B. fuckeliana strain and a fludioxonil laboratory resistant strain indicated that the two fludioxonil resistance phenotypes segregate independently. We concluded that fludioxonil resistance is influenced by at least two different genes. Genetic studies with laboratory strains resistant to both fungicides demonstrated a low segregation rate between fludioxonil and vinclozolin resistant phenotypes. These results let us hypothesize that fludioxonil and vinclozolin resistance induced in laboratory could be due to two genes closely linked. Finally, pathogenicity tests performed with progenies of sexual crosses showed a positive correlation between virulence and phenotypes.
Departement: Life Sciences und Facility Management
Publication type: Article in scientific Journal
DOI : 10.1017/S0953756202005683
ISSN: 1878-6146
URI: https://digitalcollection.zhaw.ch/handle/11475/6901
Appears in Collections:Publikationen Life Sciences und Facility Management

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