POLYMORPHIC CAC T REPETITIVE SEQUENCES IN THE PIG GENOME-1/

Three genomic clones were isolated from a size-selected pig DNA librar y by hybridization with a DNA-fingerprint probe. Analysis at the seque nce level revealed that all three clones contain interrupted stretches of triplet repeats mainly composed of CAC and CAT triplets. Evaluatio n of the corresponding loci for polymorphism by Southern blot hybridiz ation showed considerable length variation. For two loci the polymorph ism was also demonstrated by polymerase chain reaction (PCR) amplifica tion, The PiGMaP reference pedigree was typed for all three loci.