title: Myoglobin polymorphism in the pollan (Osteichthyes: Coregoninae).
abstract: Three electrophoretically separable phenotypes of heart and lateral line muscle myoglobin were found in the Irish pollan (Coregonus pollan). This polymorphism appears to be under the control of two co-dominant alleles. The allele frequencies were found to be virtually identical in samples from two lakes which have probably been isolated since the close of the last Ice Age. A significant excess of heterozygotes was found in samples from both lakes. This myoglobin polymorphism appears to be balanced, maintained due to heterozygote superiority.
mesh_terms: D000483:Alleles; D000818:Animals; D004592:Electrophoresis, Starch Gel; D005399:Fishes / Q000378:metabolism*; D005838:Genotype; D006579:Heterozygote; D009132:Muscles / Q000032:analysis; D009211:Myoglobin / Q000032:analysis; D011110:Polymorphism, Genetic
chemical_list: D009211:Myoglobin