SNP marker related to litter trait of Erhualian sow and detection method thereof

The invention discloses an SNP marker related to the litter trait of an Erhualian sow and a detection method thereof. The SNP marker is positioned on a nucleotide sequence of a calcium homologous protein gene CLSTN2 on a porcine chromosome 13; the site of the SNP marker is a nucleotide sequence g.80866929 on the porcine chromosome 13 of an international porcine genome 11.1 version reference sequence, and has A/G polymorphism; the SNP marker is significantly related to the litter size of the Erhualian sow. A primer pair for detecting the SNP marker comprises an upstream primer shown as SEQ ID NO: 2 and a downstream primer shown as SEQ ID NO: 3. The SNP marker provided by the invention is related to the litter trait of the Erhualian sow, so that a high-yield Erhualian sow strain can be screened through identification of the SNP marker, and the obtained high-yield Erhualian sow strain has an important economic benefit and an important social value. 本发明公开了种与二花脸母猪产仔性状相关的SNP标记及其检测方法。所述SNP标记位于猪13号染色体上的钙同线蛋白基因CLSTN2的