Genome-wide association study (GWAS) is an approach for identifying the genes that underlie common diseases and related quantitative traits. This strategy combines a comprehensive and unbiased survey of the genome with the power to detect common alleles with modest phenotypic effects. We collected 4 traits of 161 O. fragrans accessions, including branch length, corolla diameter, flower color, and flower number and performed GWAS combining their genotypes using GEMMA. The most significant SNP in every 500kb-window was retained. User can browse GWAS results and search significant SNPs and genes of 4 O. fragrans traits.