Search results for "Fisher's geometric model"

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Epigenetic mutations can both help and hinder adaptive evolution.

2015

Epigenetic variation is being integrated into our understanding of adaptation, yet we lack models on how epigenetic mutations affect evolution that includes de novo genetic change. We model the effects of epigenetic mutations on the dynamics and endpoints of adaptive walks—a process where a series of beneficial mutations move a population towards a fitness optimum. We use an individual-based model of an asexual population, where mutational effects are drawn from Fisher's geometric model. We find cases where epigenetic mutations speed adaptation or result in populations with higher fitness. However, we also find cases where they slow adaptation or result in populations with lower fitness. Th…

0301 basic medicinePopulationAdaptation BiologicaladaptationBiologyEpigenesis Genetic03 medical and health sciencesevolutionGeneticsComputer SimulationEpigeneticseducationEcology Evolution Behavior and SystematicsGeneticseducation.field_of_studyFisher's geometric modelNatural selectionepigeneticsModels Geneticta1184Biological Evolution030104 developmental biologyPhenotypeEvolutionary biologyFisher's geometric modelMutationta1181genetic assimilationFitness effectsGenetic FitnessAdaptationGenetic assimilationAdaptive evolutionMolecular ecology
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The contribution of epistasis to the architecture of fitness in an RNA virus

2004

4 pages, 2 figures.-- PMID: 15492220 [PubMed].-- PMCID: PMC524436.-- Additional information (Suppl. table S1: Relevant information about each single- and double-nucleotide substitution mutant created) available at: http://www.pnas.org/content/101/43/15376/suppl/DC1

RNA virusesGeneticsDNA ComplementaryMultidisciplinarybiologyEpistasis and functional genomicsRNAEpistasis GeneticEvolutionary biologyRNA virusBiological Sciencesbiology.organism_classificationGenomeInteractions among genome componentsVesicular stomatitis virusFitnessFisher's geometric modelGenotypeMutagenesis Site-DirectedEpistasisRNA VirusesEpistasisCloning MolecularMutationsProceedings of the National Academy of Sciences
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