Allozyme polymorphism at the alpha Gpdh and Adh loci and fitness in Drosophila melanogaster.
We have studied in Drosophila melanogaster the effects of allozyme variation at the alpha Gpdh and Adh loci on the following fitness components: female fecundity, egg hatchability, egg-to-adult survival under near-optimal and competitive conditions, rate of development under near-optimal and competitive conditions, and mating capacity of males. Significant effects of the alpha Gpdh locus on rate of development under competitive conditions (SS greater than FS greater than SS), and of the Adh locus on egg hatchability (FF = SS greater than FS) and egg-to-adult survival under competitive conditions (FF greater than SS = FS) were revealed. Possible natural selection mechanisms involved in the maintenance of allozyme polymorphisms at the alpha Gpdh and Adh loci are described. These mechanisms and the fitness of In(2L)t may account for the persistence and clinal distribution of the two allozyme polymorphisms in nature.
Izquierdo
J I
JI
Department of Functional Biology (Genetics), University of Oviedo, Spain.
Rubio
J
J
D000426:Alcohol Dehydrogenase / Q000235:genetics*; D000818:Animals; D004331:Drosophila melanogaster / Q000235:genetics*; D005298:Fertility; D005838:Genotype; D005954:Glucosephosphate Dehydrogenase / Q000235:genetics*; D007527:Isoenzymes / Q000235:genetics*; D011110:Polymorphism, Genetic / Q000235:genetics*; D012641:Selection, Genetic; D015996:Survival Rate
D007527:Isoenzymes; D000426:Alcohol Dehydrogenase; D005954:Glucosephosphate Dehydrogenase