Genotyping by sequencing suggests overwintering of Peronospora destructor in southwestern Quebec, Canada.

ABSTRACT: Several Peronospora species are carried by wind over short and long distances, from warmer climates where they survive on living plants to cooler climates. In eastern Canada, this annual flow of sporangia was thought to be the main source of Peronospora destructor responsible for onion downy mildew. However, the results of a recent study showed that the increasing frequency of onion downy mildew epidemics in eastern Canada is associated with warmer autumns, milder winters, and previous year disease severity, suggesting overwintering of the inoculum in an area where the pathogen is not known to be endogenous. In this study, genotyping by sequencing was used to investigate the population structure of P. destructor at the landscape scale. The study focused on a particular region of southweste

SUBMITTER: Van der Heyden H 

PROVIDER: S-EPMC8828460 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature