ANSC 305 Hog Skin Pigmentation and Spotting The I allele inhibits pigmentation in hogs. Therefore, pigs that have II at the inhibition locus are white with light skin pigmentation. When pigs have ii at the inhibition locus, pigmentation is not inhibited allowing pigs to have a dark skin pigmentation. An example of a genotype that would result in a pig that is white with dark skin pigmentation is: iieeDDKK. Below are pictures of the different whites. White (with light skin pigmentation): White with dark skin pigmentation: The EP allele creates black spotting when the rest of the genotype allows for it. These spots look different than dark skin spots. Dark skin spots only affect the skin pigmentation and not the hair. We can see these in predominantly white pigs. Black spots affect both skin and hair pigmentation (sometimes the black skin pigmentation extends beyond the black hairs). Pigs that are red, sandy, or white can have black spots. Below is a picture of each type of spotting. Dark skin spots: Black