DIRECTIONAL AND STABILIZING DENSITY-DEPENDENT NATURAL SELECTION FOR PUPATION HEIGHT IN DROSOPHILA MELANOGASTER
نویسندگان
چکیده
منابع مشابه
Stabilizing selection in Drosophila melanogaster.
Stabilizing selection operates on egg length in Drosophila melanogaster. The percentage of eggs hatching decreases with departure from the population mean size; this effect cannot be explained by the model of neutral variation in a quantitative character. The finding of stabilizing selection agrees with expectations for a character inherited primarily through additive effects.
متن کاملElucidating the behavioral phenotype of Drosophila melanogaster larvae: correlations between larval foraging strategies and pupation height.
Larvae which demonstrated long trails covering a large area while feeding (rover foragers) pupated significantly higher than those covering a relatively small area and exhibiting short paths (sitter foragers). Pupation height and density of larvae per vial were positively correlated. Under the condition o f equal larval density per vial, rovers were found to pupate significantly higher than sit...
متن کاملFitness and density-dependent population growth in Drosophila melanogaster.
The density-dependent rates of population growth were determined for 26 populations of Drosophila melanogaster maintained in the serial transfer system. Twenty-five populations were homozygous for an entire chromosome 2 sampled from nature; the other was a random heterozygous population. Rates of population growth around the carrying capacity cannot explain the large fitness depression of these...
متن کاملDirectional versus Stabilizing Selection for Developmental Time in Natural and Laboratory Populations of Flour Beetles.
Artificial selection for fast development is successful in long-established laboratory populations of Tribolium, but not in strains recently derived from natural populations. It is shown that selection against fast development in dense, synchronized cultures operates through cannibalism of early pupae by larvae. Since standard husbandry procedures for laboratory strains involve the periodic cre...
متن کاملReduced natural selection associated with low recombination in Drosophila melanogaster.
Synonymous codons are not used equally in many organisms, and the extent of codon bias varies among loci. Earlier studies have suggested that more highly expressed loci in Drosophila melanogaster are more biased, consistent with findings from several prokaryotes and unicellular eukaryotes that codon bias is partly due to natural selection for translational efficiency. We link this model of vary...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Evolution
سال: 1993
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1993.tb01208.x