This invention relates to the application of molecular markers related to the growth performance of finishing pigs, the reproductive performance of lactating sows, and the
flavor of pork. The molecular markers are related to the L-
valine content in the longissimus dorsi
muscle of pigs. This invention discloses a method for identifying the growth performance of finishing pigs, the reproductive performance of lactating sows, and the
flavor of pork, as well as a breeding method for selecting pigs with better growth performance in finishing pigs, reproductive performance in lactating sows, and superior
meat flavor. This method determines the
genotype of the pig by detecting the
nucleotide position 72599544 on
chromosome 1 of the pig
reference genome Sscrofa11.1, GCF_000003025.6. The L-
valine content in the longissimus dorsi
muscle of pigs with the GG
genotype at this locus is higher than that of pigs with the TG
genotype, and the TG genotype pigs have a higher content than the TT genotype pigs. In practical breeding work, pigs with the genotype GG at locus 72599544 can be selected as parents for breeding, which is of great significance for selecting pigs with better growth performance in fattening pigs, better reproductive performance in lactating sows, and better pork
flavor.