Further contribution to the H blood group system in pigs

Summary The haemolytic reagent allowing direct serological detection of He homozygous pigs was obtained by the immunization of a Landrace sow. Another monospecific reagent prepared from immune serum of a Miniature pig made possible the evidence for a new factor of the H system - He. This factor is genetically controlled by the allele Hbe. Its frequency in Miniature pigs was 0.099. The H system with alleles H1=Ha, H2= Hb, H3= Hab, H4=Hcd, H5= Hbd, H6=Hbe and H7= H- continues to be a genetically open system.