关键词: 番茄, 抗旱性, 全基因组关联分析, 候选基因

Abstract: To conduct genome-wide association studies（GWAS）of drought tolerance，the relative water loss of detached leaves was analyzed after 24 h dehydration in 301 tomato（Solanum lycopersicum L.）accessions. A total number of three SNP sites（S02.1158758，S02.1160893，and S05.1426646）significantly associated with the drought tolerance of tomato accessions were identified by GWAS. Each single locus could explain 4.08%–18.97% of the phenotypic variation. Taken together，three SNP sites and seven candidate genes significantly associated with drought tolerance in tomato were identified in this study，which will help unravel the genetic and regulatory mechanisms of tomato drought tolerance，as well as establish a foundation for the genetic improvement of tomato stress tolerance.

Key words: tomato, drought tolerance, genome-wide association studies, candidate gene