Sexual reproduction contributes to the evolution of resistance-breaking isolates of the spinach pathogen Peronospora effusa.

ABSTRACT: Peronospora effusa causes downy mildew, the economically most important disease of cultivated spinach worldwide. To date, 19 P. effusa races have been denominated based on their capacity to break spinach resistances, but their genetic diversity and the evolutionary processes that contribute to race emergence are unknown. Here, we performed the first systematic analysis of P. effusa races showing that those emerge by both asexual and sexual reproduction. Specifically, we studied the diversity of 26 P. effusa isolates from 16 denominated races based on mitochondrial and nuclear comparative genomics. Mitochondrial genomes based on long-read sequencing coupled with diversity assessment based on short-read sequencing uncovered two mitochondrial haplogroups, each with distinct genome organizatio

SUBMITTER: Skiadas P 

PROVIDER: S-EPMC9304176 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature