Allelic expression at the sorbitol dehydrogenase and glucosephosphate isomerase loci in an interspecific hybrid ricefish.
1. The expression of alleles encoding the enzymes sorbitol dehydrogenase (SDH; EC 1.1.1.14) and glucosephosphate isomerase (GPI; EC 5.3.1.9) was investigated in Oryzias melastigma, O. javanicus and in O. melastigma female x O. javanicus male hybrids by acrylamide gel electrophoresis. 2. It was not possible to investigate the expression of SDH or GPI in reciprocal hybrids as these fry failed to develop past the stage of embryonic body formation. 3. The delay in appearance of isozymes of paternal SDH subunit composition, and paternal and maternal GPI-B subunit composition is in keeping with observed effects of gene regulatory divergence where alleles of maternal origin interact more effectively with maternal cytoplasmic regulatory factors than do alleles of paternal origin.
Frankel
J S
JS
Department of Zoology, Howard University, Washington, DC 20059.
D000483:Alleles; D000818:Animals; D003532:Cyprinodontiformes / Q000235:genetics*; D005260:Female; D005786:Gene Expression Regulation; D005956:Glucose-6-Phosphate Isomerase / Q000235:genetics*; D006824:Hybridization, Genetic; D007527:Isoenzymes / Q000235:genetics; D007064:L-Iditol 2-Dehydrogenase / Q000235:genetics*; D008297:Male; D009990:Oryzias / Q000235:genetics*; D013401:Sugar Alcohol Dehydrogenases / Q000235:genetics*
D007527:Isoenzymes; D013401:Sugar Alcohol Dehydrogenases; D007064:L-Iditol 2-Dehydrogenase; D005956:Glucose-6-Phosphate Isomerase