As a result of several cycles of isoimmunization, two variants of anti
sera dose-dependently reacting with antigens of the porcine G blood gr
oup were obtained. It is suggested that the specific response of immun
ized pigs to antigens inherited from different wild boar subspecies ma
y be associated with allele G(a) and probably with Robertsonian transl
ocations 15/17 and 16/17.