Genome-wide association study of salicylic acid provides genetic insights for tea plant selective breeding.

ABSTRACT: Salicylic acid (SA) is a phenolic phytohormone widely believed to regulate plant growth and stress response. Despite its significance, the genetic basis of SA-mediated resistance to biotic stressors in tea plants is little understood. Our study investigated the genetic diversity, population structure, and linkage disequilibrium (LD) patterns of 299 tea accessions using 79 560 high-quality single nucleotide polymorphisms (SNPs) obtained from genotyping-by-sequencing (GBS) data. Our genome-wide association study identified CSS0033791.1, an essential gene encoding 9-cis-epoxycarotenoid dioxygenase (CsNCED1), which catalyzes a vital step in abscisic acid (ABA) biosynthesis. Exogenous ABA treatment and transgenic overexpression of the CsNCED1 gene lowered SA content in the respect

SUBMITTER: Deng X 

PROVIDER: S-EPMC11891476 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature