Concurrent evolution of resistance and tolerance to potato virus Y in Capsicum annuum revealed by genome-wide association.

ABSTRACT: We performed a genome-wide association study of pepper (Capsicum annuum) tolerance to potato virus Y (PVY). For 254 pepper accessions, we estimated the tolerance to PVY as the coefficient of regression of the fresh weight (or height) of PVY-infected and mock-inoculated plants against within-plant virus load. Small (strongly negative) coefficients of regression indicate low tolerance because plant biomass or growth decreases sharply as virus load increases. The tolerance level varied largely, with some pepper accessions showing no symptoms or fairly mild mosaics, whereas about half (48%) of the accessions showed necrotic symptoms. We found two adjacent single-nucleotide polymorphisms (SNPs) at one extremity of chromosome 9 that were significantly associated with tolerance to PVY. Similarly,

SUBMITTER: Tamisier L 

PROVIDER: S-EPMC8743019 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature