GWAS

The productivity per sow per year (PSY) has key impact on the economic benefits in swine industry.¹Age at first service (AFS) and gestation length (GL) are the two important components of PSY. AFS is the age of the first service，and GL is defined as the interval (days) between insemination and farrowing.^2-3 Previous quantitative trait locus study and Genome-wide association study (GWAS) have identified the genomic regions and SNPs that are associated with AFS and GL in different pig breed populations，but have not been reported in Danish population. Danish Yorkshire pigs are distinguished by their ability to produce large litters of piglets and may have genetic difference with other breeding population. Thus, the purpose of this study is to identify AFS and GL related variants and candidate genes in Danish Yorkshire pig population using GWAS.