2005
A cryptic taxon of Galpagos tortoise in conservation peril
Russello M, Glaberman S, Gibbs J, Marquez C, Powell J, Caccone A. A cryptic taxon of Galpagos tortoise in conservation peril. Biology Letters 2005, 1: 287-290. PMID: 17148189, PMCID: PMC1617146, DOI: 10.1098/rsbl.2005.0317.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsDNAExtinction, BiologicalGenetic MarkersGenetic VariationGenetics, PopulationPhylogenySpecies SpecificityTurtlesConceptsBiological diversityFormal taxonomic designationGenetic divergenceGalápagos tortoisesAccurate taxonomyDistinct lineagesTaxonomic investigationGenetic divisionTaxonomic designationsSingle taxonGiant tortoisesBad taxonomyEvolutionary heritageNew taxonTaxaAccessible islandsTortoisesHuman intellectual historyDiversityConservationSanta CruzTaxonomyLineagesGalápagosOrganisms
2004
Giant tortoises are not so slow: Rapid diversification and biogeographic consensus in the Galápagos
Beheregaray L, Gibbs J, Havill N, Fritts T, Powell J, Caccone A. Giant tortoises are not so slow: Rapid diversification and biogeographic consensus in the Galápagos. Proceedings Of The National Academy Of Sciences Of The United States Of America 2004, 101: 6514-6519. PMID: 15084743, PMCID: PMC404076, DOI: 10.1073/pnas.0400393101.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBiological EvolutionDNA, MitochondrialEcuadorGenetic VariationGeographyHaplotypesMolecular Sequence DataSpecies SpecificityTurtlesConceptsGiant Galápagos tortoisesGalápagos tortoisesGreat natural laboratoryGenetic variationDivergent monophyletic cladesHistory of diversificationIsolated oceanic archipelagoPatterns of colonizationBiogeographic predictionsEvolutionary diversificationGene flowEndemic haplotypesExtant populationsLimited dispersalOceanic archipelagosBiogeographic patternsEvolutionary eventsBiological diversificationMonophyletic cladeMtDNA sequencesRapid diversificationGenetic interchangeRange expansionOlder islandsGiant tortoises
2002
Speciation Within Anopheles gambiae-- the Glass Is Half Full
della Torre A, Costantini C, Besansky N, Caccone A, Petrarca V, Powell J, Coluzzi M. Speciation Within Anopheles gambiae-- the Glass Is Half Full. Science 2002, 298: 115-117. PMID: 12364784, DOI: 10.1126/science.1078170.Peer-Reviewed Original ResearchMeSH KeywordsAdaptation, PhysiologicalAfrica South of the SaharaAllelesAnimalsAnophelesBiological EvolutionChromosome InversionChromosomesDNA, RibosomalEcosystemEnvironmentFeeding BehaviorGenetic VariationGenetics, PopulationGenomeHuman ActivitiesHumansInsect Bites and StingsInsect VectorsMalariaMicrosatellite RepeatsReproductionSequence Analysis, DNA
2001
Mitochondrial DNA Sequences of Triatomines (Hemiptera: Reduviidae): Phylogenetic Relationships
García B, Moriyama E, Powell J. Mitochondrial DNA Sequences of Triatomines (Hemiptera: Reduviidae): Phylogenetic Relationships. Journal Of Medical Entomology 2001, 38: 675-683. PMID: 11580040, DOI: 10.1603/0022-2585-38.5.675.Peer-Reviewed Original ResearchConceptsMitochondrial DNA sequencesPhylogenetic relationshipsDNA sequencesCytochrome oxidase I geneOxidase I geneCOI gene sequencesRibosomal RNA genesSpecies of TriatominaeSpecies of TriatomaT. delponteiT. circummaculataRNA genesT. mazzottiiPhylogenetic analysisGenus TriatomaMtDNA fragmentsGene sequencesMorphological charactersI geneRhodnius prolixus StålSame genusPossible outgroupsT. platensisT. dimidiataT. sordida
1996
Intraspecific nuclear DNA variation in Drosophila.
Moriyama E, Powell J. Intraspecific nuclear DNA variation in Drosophila. Molecular Biology And Evolution 1996, 13: 261-277. PMID: 8583899, DOI: 10.1093/oxfordjournals.molbev.a025563.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsDNADrosophilaGenetic VariationModels, TheoreticalMolecular Sequence DataPolymorphism, GeneticSequence AnalysisConceptsD. melanogasterDNA polymorphismsD. simulansD. pseudoobscuraNeutral theorySpecies of DrosophilaNuclear DNA variationMcDonald-Kreitman testNon-coding DNALevel of polymorphismFourfold degenerate sitesCodon usage biasLevel of variationReplacement polymorphismsNucleotide heterozygosityNoncoding DNAHKA testTajima's testReplacement substitutionsDNA variationSilent sitesGenetic codeAutosomal genesPopulation historyUsage bias
1991
Monophyly/paraphyly/polyphyly and gene/species trees: an example from Drosophila.
Powell J. Monophyly/paraphyly/polyphyly and gene/species trees: an example from Drosophila. Molecular Biology And Evolution 1991, 8: 892-896. PMID: 1775070, DOI: 10.1093/oxfordjournals.molbev.a040695.Peer-Reviewed Original Research
1985
Oral infection of Aedes aegypti with yellow fever virus: geographic variation and genetic considerations.
Tabachnick W, Wallis G, Miller B, Powell J, Lorenz L, Aitken T, Beaty B, Amato G. Oral infection of Aedes aegypti with yellow fever virus: geographic variation and genetic considerations. American Journal Of Tropical Medicine And Hygiene 1985, 34: 1219-24. PMID: 3834804, DOI: 10.4269/ajtmh.1985.34.1219.Peer-Reviewed Original Research
1984
Genetic heterogeneity among Caribbean populations of Aedes aegypti.
Wallis G, Tabachnick W, Powell J. Genetic heterogeneity among Caribbean populations of Aedes aegypti. American Journal Of Tropical Medicine And Hygiene 1984, 33: 492-8. PMID: 6731681, DOI: 10.4269/ajtmh.1984.33.492.Peer-Reviewed Original Research
1983
Macrogeographic genetic variation in a human commensal: Aedes aegypti, the yellow fever mosquito
Wallis G, Tabachnick W, Powell J. Macrogeographic genetic variation in a human commensal: Aedes aegypti, the yellow fever mosquito. Genetics Research 1983, 41: 241-258. PMID: 6884770, DOI: 10.1017/s0016672300021315.Peer-Reviewed Original ResearchConceptsGenetic variationGenetic population structureDistinct gene poolsGenetic distance dataAedes aegyptiGenetic distance valuesNew World populationsYellow fever mosquitoEnzyme lociGene poolUPGMA treePopulation structureHuman commensalMajor clustersSouth-eastern U.S.A. aegyptiEast AfricaAegyptiAegypti aegyptiAegypti formosusEpidemiological implicationsDistance valuesDistance dataLociPopulation
1977
MICROGEOGRAPHIC DIFFERENTIATION OF CHROMOSOMAL AND ENZYME POLYMORPHISMS IN DROSOPHILA PERSIMILIS
Taylor C, Powell J. MICROGEOGRAPHIC DIFFERENTIATION OF CHROMOSOMAL AND ENZYME POLYMORPHISMS IN DROSOPHILA PERSIMILIS. Genetics 1977, 85: 681-695. PMID: 863240, PMCID: PMC1213650, DOI: 10.1093/genetics/85.4.681.Peer-Reviewed Original ResearchConceptsDrosophila persimilisEnzyme polymorphismsTemporal genetic differentiationRandom genetic driftGenetic differentiationNatural populationsGenetic driftChromosome inversionsHabitat preferencesAllozyme frequenciesMicrogeographic differentiationDispersal behaviourSelection coefficientsModel of selectionInversion frequenciesPersimilisDifferentiationHeterogeneous environmentsBehavioral differencesPolymorphismSpeciesGenotypesShort distances
1974
Temperature related genetic divergence in Drosophila body size
Powell J. Temperature related genetic divergence in Drosophila body size. Journal Of Heredity 1974, 65: 257-258. PMID: 4416060, DOI: 10.1093/oxfordjournals.jhered.a108523.Peer-Reviewed Original Research
1972
Enzyme variability in the Drosophila willistoni Group. V. Genic variation in natural populations of Drosophila equinoxialis*
Ayala F, Powell J, Tracey M. Enzyme variability in the Drosophila willistoni Group. V. Genic variation in natural populations of Drosophila equinoxialis*. Genetics Research 1972, 20: 19-42. PMID: 5084410, DOI: 10.1017/s0016672300013562.Peer-Reviewed Original ResearchMeSH KeywordsAllelesAnimalsDrosophilaElectrophoresis, Starch GelGene FrequencyGenetic VariationGenetics, PopulationHeterozygotePolymorphism, GeneticConceptsGenetic variationD. equinoxialisNatural populationsAllelic variationDrosophila willistoni groupMdh-2 locusStarch gel electrophoresisGenic variationD. willistoniWillistoni groupNeotropical speciesNatural selectionGenetic variabilityEnzyme variabilityEst-3LociSpeciesGene frequenciesSame alleleCommon allelesAllelesAllelic frequenciesLocalitiesWillistoniGenesAllozymes as Diagnostic Characters of Sibling Species of Drosophila
Ayala F, Powell J. Allozymes as Diagnostic Characters of Sibling Species of Drosophila. Proceedings Of The National Academy Of Sciences Of The United States Of America 1972, 69: 1094-1096. PMID: 4504321, PMCID: PMC426637, DOI: 10.1073/pnas.69.5.1094.Peer-Reviewed Original ResearchMeSH KeywordsAcid PhosphataseAdenine NucleotidesAlkaline PhosphataseAllelesAnimalsDrosophilaEsterasesGene FrequencyGenetic VariationGenetics, PopulationGenotypeGlyceraldehyde-3-Phosphate DehydrogenasesHexokinaseLeucyl AminopeptidaseMalate DehydrogenasePhosphoglucomutasePhosphotransferasesSpecies Specificity