Apparent overdominance of enzyme specific activity in two marine bivalves

Apparent overdominance of enzyme specific activity in two marine bivalves

Electrophoretic examination of a natural population sample of 332 mussels (Mytilus trossulus ) revealed ten active allozyme alleles for the octopine dehydrogenase (Odh) locus and a statistically significant departure from expected genotypic proportions caused by a deficiency of heterozygous genotype...

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Bibliographic Details
Published in:Genetica Vol. 85; no. 3; pp. 231 - 239
Main Authors: Sarver, S.K. (Louisiana State Univ., Baton Rouge, LA (USA). Dept. of Zoology and Physiology), Katoh, M, Foltz, D.W
Format: Journal Article
Language:English
Published: Dordrecht Springer 1992
Subjects:
ALLOZYME
ALLOZYMES
ALOZIMAS
Animals
Biological and medical sciences
Classical genetics, quantitative genetics, hybrids
CRASSOSTREA VIRGINICA
ELECTROFORESIS
ELECTROPHORESE
ELECTROPHORESIS
Fundamental and applied biological sciences. Psychology
GENE
GENES
Genetics of eukaryotes. Biological and molecular evolution
GENOTIPOS
GENOTYPE
GENOTYPES
Invertebrata
Marine
MYTILUS
Mytilus trossulus
Heterozygozity
D-Octopine dehydrogenase
Enzyme
Population genetics
Aminopeptidase (cytosol)
Marine environment
Enzymatic activity
Gene frequency
Bivalvia
Crassostrea virginica
Invertebrata
Mollusca
Polymorphism
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Summary:Electrophoretic examination of a natural population sample of 332 mussels (Mytilus trossulus ) revealed ten active allozyme alleles for the octopine dehydrogenase (Odh) locus and a statistically significant departure from expected genotypic proportions caused by a deficiency of heterozygous genotypes. In vitro specific activity for octopine dehydrogenase (E.C. 1.5.1.11) was determined for 207 mussels representing 17 different Odh genotypes. Odh heterozygotes had an average specific activity that was 19% greater than that of apparently homozygous genotypes, a significant (P < 0.05) difference. Possible explanations for the apparent overdominance in enzyme specific activity and the deficiency of heterozygotes include null alleles, molecular imprinting and aneuploidy.
Bibliography:9204346
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ISSN:0016-6707
1573-6857
DOI:10.1007/BF00132275