References

H blood types in pigs as predictors of stress susceptibility.

Science. 1976 Mar 5;191(4230):947-8. Rasmusen BA, Christian LL.

• At least two genotypes in the H system of blood groups in pigs are responsible for blood types associated with the porcine stress syndrome (PSS), and at least three genotypes are responsible for blood types associated with freedom from PSS. Two blood types, each of which apparently may result from more than one genotype, are associated with PSS in some pigs and not in others.