منابع مشابه
Genotype-environment interactions and the estimation of the genomic mutation rate in Drosophila melanogaster.
We have studied the relative fitnesses of three genotypes of Drosophila melanogaster in 50 environments. Two genotypes, the MA lines, had accumulated mutations in the absence of natural selection over 62 generations. The third was a related strain where selection had continued to act. The environments differed in three factors: parental density, dilution of the medium, and the temperature régim...
متن کاملReverse evolution of fitness in Drosophila melanogaster
The evolution of fitness is central to evolutionary theory, yet few experimental systems allow us to track its evolution in genetically and environmentally relevant contexts. Reverse evolution experiments allow the study of the evolutionary return to ancestral phenotypic states, including fitness. This in turn permits well-defined tests for the dependence of adaptation on evolutionary history a...
متن کاملSex and genotype effects on nutrient-dependent fitness landscapes in Drosophila melanogaster.
The sexes perform different reproductive roles and have evolved sometimes strikingly different phenotypes. One focal point of adaptive divergence occurs in the context of diet and metabolism, and males and females of a range of species have been shown to require different nutrients to maximize their fitness. Biochemical analyses in Drosophila melanogaster have confirmed that dimorphism in dieta...
متن کاملMitochondrial genotype affects fitness in Drosophila simulans.
Drosophila simulans is known to harbor three distinct mitochondrial DNA (mtDNA) haplotype groups (siI, -II, and -III) with nearly 3.0% interhaplotypic divergence but <0.06% intrahaplotypic diversity. With the large amount of genetic variation in this system, the potential power to detect intraspecific fitness differences in fly lines that carry distinct haplotypes is great. We test three life-h...
متن کاملGenotype-by-Environment Interactions and Adaptation to Local Temperature Affect Immunity and Fecundity in Drosophila melanogaster
Natural populations of most organisms harbor substantial genetic variation for resistance to infection. The continued existence of such variation is unexpected under simple evolutionary models that either posit direct and continuous natural selection on the immune system or an evolved life history "balance" between immunity and other fitness traits in a constant environment. However, both local...
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ژورنال
عنوان ژورنال: The Journal of Basic & Applied Zoology
سال: 2015
ISSN: 2090-9896
DOI: 10.1016/j.jobaz.2015.01.003