Genetic analysis and molecular characterisation of laboratory and field mutants of <i>Botryotinia fuckeliana</i> (<i>Botrytis cinerea</i>) resistant to QoI fungicides

Abstract

The G143A mutation in cytb gene is confirmed to be responsible for field resistance to QoIs in B. fuckeliana. Maternal inheritance of resistance to QoIs in progeny of sexual crosses confirmed that it is caused by extranuclear genetic determinants. In laboratory mutants the heteroplasmic state of mutated mitochondria could likely hamper the G143A detection, otherwise other gene(s) underlying different mechanisms of resistance could be involved.