Fecha de publicación: 10/11/2022 Fuente: WIPO Meat The present application provides an SNP molecular marker affecting duck fatty acid composition-related gene ELOVL3, and the use thereof in breeding duck meat, identifying meat quality, etc., wherein the SNP molecular marker of the present application is located at -619 bp upstream of the ELOVL3 gene, and the genotype is AA, GG or GA. According to the present invention combined with a GWAS analysis and cell test, SNP located upstream of the ELOVL3 gene that affects the expression activity thereof is identified, and further detection determines that an AA-type individual has a higher polyunsaturated fatty acid carbon chain elongation ability than a GG-type individual, while a dominant genotype that is favorable for improving the fatty acid content of duck meat for seed retention can be selected.