Phenotypic plasticity in colonizing populations of Drosophila subobscura
نویسندگان
چکیده
منابع مشابه
Evolutionary pace of chromosomal polymorphism in colonizing populations of Drosophila subobscura: an evolutionary time series.
Biologists have long debated the speed, uniformity, and predictability of evolutionary change. However, evaluating such patterns on a geographic scale requires time-series data on replicate sets of natural populations. Drosophila subobscura has proven an ideal model system for such studies. This fly is broadly distributed in the Old World, but was introduced into both North and South America ju...
متن کاملMitochondrial DNA evolution in experimental populations of Drosophila subobscura.
When two mitochondrial DNA (mtDNA) haplotypes of Drosophila subobscura compete in experimental populations with discrete generations, one or the other approaches fixation, depending on the nuclear background with which they are associated. The approach to fixation, however, is strongly dependent on the effective number of females in the population, Nf. Whether or not the ultimate fate of a give...
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Phenotypic plasticity is the ability of a single genotype to produce different phenotypes in response to changing environments. We assessed variation in genome-wide gene expression and four fitness-related phenotypes of an outbred Drosophila melanogaster population under 20 different physiological, social, nutritional, chemical, and physical environments; and we compared the phenotypically plas...
متن کاملEnvironmental heterogeneity does not affect levels of phenotypic plasticity in natural populations of three Drosophila species
Adaptation of natural populations to variable environmental conditions may occur by changes in trait means and/or in the levels of plasticity. Theory predicts that environmental heterogeneity favors plasticity of adaptive traits. Here we investigated the performance in several traits of three sympatric Drosophila species freshly collected in two environments that differ in the heterogeneity of ...
متن کاملThe genetics of Drosophila subobscura populations. IX. Studies on linkage disequilibrium in four natural populations.
Gametic frequencies were obtained in four natural populations of D. sub-obscura by extracting wild chromosomes and subsequently analyzing them for inversions and allozymes. The genes Lap and Pept-1, both located within the same inversions of chromosome O, were found in striking nonrandom associations with them of the same kind and degree in all populations studied. On the contrary, the gene Acp...
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ژورنال
عنوان ژورنال: Genetics and Molecular Biology
سال: 1999
ISSN: 1415-4757
DOI: 10.1590/s1415-47571999000400008