Recognition of lettuce downy mildew effector BLR38 in Lactuca serriola LS102 requires two unlinked loci.

ABSTRACT: Plant-pathogenic oomycetes secrete effector proteins to suppress host immune responses. Resistance proteins may recognize effectors and activate immunity, which is often associated with a hypersensitive response (HR). Transient expression of effectors in plant germplasm and screening for HR has proven to be a powerful tool in the identification of new resistance genes. In this study, 14 effectors from the lettuce downy mildew Bremia lactucae race Bl:24 were screened for HR induction in over 150 lettuce accessions. Three effectors-BLN06, BLR38 and BLR40-were recognized in specific lettuce lines. The recognition of effector BLR38 in Lactuca serriola LS102 did not co-segregate with resistance against race Bl:24, but was linked to resistance against multiple other B. lactucae races. Two unlink

SUBMITTER: Pelgrom AJE 

PROVIDER: S-EPMC6637914 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature