Signatures of Selection for Intramuscular Fat in Duroc Pigs

Intramuscular fat (IMF) content is an important trait affecting the quality of pork. Two Duroc populations (Iowa and Spain) selected for IMF were used to identify signatures of selection associated with IMF. The effects of selection were analyzed between two groups representing essentially select and control animals within each population using a discriminant analysis of principal components and Wright’s fixation index (FST) using 60k SNPs. Moreover, extended haplotype homozygosity-based approaches were used to examine the changes in haplotype frequency due to recent selection. New genomic regions have been identified by use of selection signatures and should provide useful information identification of genes involved in IMF and future selection