SNP (Single Nucleotide Polymorphism) molecular marker positioned on chromosome 8 and related to semen density character of boar and application of SNP molecular marker

The invention belongs to the technical field of molecular biotechnology and molecular markers, and particularly relates to an SNP (Single Nucleotide Polymorphism) molecular marker located on a chromosome 8 and related to the semen density character of a boar and application of the SNP molecular marker. The SNP site of the SNP molecular marker which is located on the No.8 chromosome and is related to the semen density character of the boar corresponds to Agt at the 25907618bp position on the No.8 chromosome of the version 11.1 of an international pig reference genome; g mutation, and the polymorphism of the base at the site affects the semen density character of the boar. The problem of genetic improvement of the boar semen density is solved by means of molecular breeding, and the dominant allele frequency can be increased generation by generation, the boar semen density can be improved and the progress of genetic improvement of boars can be accelerated by optimizing the dominant allele of the SNP, so that the