A Rare Recombination in the Phytophthora sojae Genome Allows the Redefinition of a Major Avirulence Gene.

ABSTRACT: Significant yield losses in soybean production are imputable to Phytophthora root and stem rot (PRR) caused by Phytophthora sojae. Resistance to PRR relies on resistance genes (Rps) that recognize key effectors from the pathogen, which are encoded by avirulence genes (Avr). Key Avr haplotypes can be monitored in natural P. sojae populations and exploited to predict which resistance gene can be deployed to provide protection to the soybean crop. In this study, we reassessed the identity of the avirulence gene whose protein product is recognized by Rps6. Following extensive soil sampling and single-spore isolation of a large population of P. sojae, we found two salient isolates carrying a rare recombination between the closely linked effectors Avr3c and Avr4/6. Using a PCR assay and molecula

SUBMITTER: Asselin Y 

PROVIDER: S-EPMC13472948 | biostudies-literature | 2026 Aug

REPOSITORIES: biostudies-literature