The invention discloses an SNP (
Single Nucleotide Polymorphism)
molecular marker related to mummy number on a porcine
chromosome 5. SNP loci of the SNP
molecular marker correspond to 22th, 452nd and 453rd Cgt on a
chromosome 5 of a reference sequence of an international porcine
genome version 11.1; and the polymorphism of the basic group at the site leads to the difference of the
mutagenesis of the pigs. By verifying the influence effect of the
molecular marker on the mummy number of sows, an efficient and accurate molecular marker-assisted breeding technology is finally established, and the molecular marker is applied to genetic improvement of reducing the mummy number of boars, so that the reproductive performance of
offspring pigs is improved, and the economic profit of enterprises is increased. Accordingly, a corresponding genetic improvement method is established, and by optimizing the dominant alleles of the SNP, the dominant alleles frequency can be increased generation by generation, the number of mugs produced by sows can be reduced, and the progress of genetic improvement of pigs can be accelerated, so that the economic benefit of breeding of the boars can be effectively improved. Besides, a primer pair for amplifying a
nucleotide sequence of the SNP molecular marker is further researched and designed, breeding traits can be rapidly and accurately bred through the primer pair, and the breeding process is accelerated.