title: Detection of a null allele for MDH isozymes in the guppy (Poecilia reticulata), with special reference to sex-linked inheritance.
abstract: Malate dehydrogenase (MDH) was examined by starch gel electrophoresis for strain differences in the guppy, Poecilia reticulata. The electrophoretic patterns revealed duplicate gene loci encoding a mitochondrial form of MDH and the existence of a null allele at one of the duplicate loci. Different phenotypic frequencies at Mdh-4 were observed among 9 strains and between males and females within each strain. The progeny tests for Mdh-4 variants in the inter-strain crosses indicated a mode of partial sex-linked inheritance.
authors.affiliation: Department of Fishery Science, Faculty of Agriculture, Tohoku University, Sendai.
authors.forename: Y
authors.initials: Y
authors.lastname: Fujio
authors.forename: J M
authors.initials: JM
authors.lastname: Macaranas
mesh_terms: D000483:Alleles; D000818:Animals; D003433:Crosses, Genetic; D003532:Cyprinodontiformes / Q000235:genetics*; D004592:Electrophoresis, Starch Gel; D005260:Female; D008040:Genetic Linkage; D007527:Isoenzymes / Q000235:genetics* / Q000378:metabolism; D008291:Malate Dehydrogenase / Q000235:genetics* / Q000378:metabolism; D008297:Male; D008928:Mitochondria / Q000201:enzymology; D009928:Organ Specificity / Q000235:genetics; D010641:Phenotype; D011036:Poecilia / Q000235:genetics*; D012730:Sex Chromosomes
chemical_list: D007527:Isoenzymes; D008291:Malate Dehydrogenase