[Inheritance of liver isocitrate dehydrogenase in the humpback salmon Oncorhynchus gorbuscha (Walb.)]

Genetic variants of NADP+-dependent soluble isocitrate dehydrogenase (sIDH) expressed in pink salmon liver have been studied. The progeny of 16 individual crossings has been analysed. It is shown that sIDH in the liver of pink salmon is a dimer and is coded for by two duplicated loci, one of which is represented by 3 alleles (82, 100 and 124) and the other, probably by two (100 and 124). The products of the most frequently occurring alleles of these loci are almost similar in their electrophoretic mobility. Polypeptides coded for by the alleles of both loci combine freely, generating heterodimers.