title: Polymorphism of A, B and C loci of lactate dehydrogenase in european fish species of the Cyprinidae family.
abstract: In 24 fish species of the Cyprinidae family, belonging to 21 genera, isoenzyme patterns of lactate dehydrogenase (LDH) were determined, which could be classified in the majority of cases into 3 main groups. Isoenzyme patterns in natural hybrids of roach and rudd, roach and bream, roach and bleak were also analysed. In bitterling, polymorphism was observed in B locus of LDH. In white bream polymorphism exists in the A locus. In bream, rudd, silver carp and barbel polymorphism was found in C loci. Isoenzyme patterns indicate that in each case the polymorphism is genetically controlled by two alleles at a single locus. The populations investigated were in Hardy-Weinberg equilibrium. No significant differences were found in the activity of liver LDH in various polymorphic types of C loci of bream and rudd.
mesh_terms: D000483:Alleles; D000818:Animals; D002874:Chromosome Mapping; D003530:Cyprinidae / Q000378:metabolism*; D005787:Gene Frequency; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase / Q000235:genetics*; D008099:Liver / Q000201:enzymology; D009132:Muscles / Q000201:enzymology; D010641:Phenotype; D011110:Polymorphism, Genetic
chemical_list: D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase