The STEAP4 gene encoding metalloreductase, which is associated with obesity and insulin-resistance in human [64]–[66], is located at 74.98 Mb on SSC9, very close to the strongest association signal (ALGA0053636) detected in the Sutai piglets, and thereby is an excellent positional and biological candidate gene for this QTL. This evidence concerns the gene STEAP4 and Insulin resistance.