1996
A molecular phylogeny for the Drosophila melanogaster subgroup and the problem of polymorphism data.
Caccone A, Moriyama E, Gleason J, Nigro L, Powell J. A molecular phylogeny for the Drosophila melanogaster subgroup and the problem of polymorphism data. Molecular Biology And Evolution 1996, 13: 1224-1232. PMID: 8896375, DOI: 10.1093/oxfordjournals.molbev.a025688.Peer-Reviewed Original ResearchConceptsDNA-DNA hybridization dataDNA sequence dataSequence dataD. sechelliaMelanogaster subgroupD. mauritianaHybridization dataNuclear DNA sequence dataPrevious DNA-DNA hybridization dataNew DNA sequence dataSerendipity alpha geneDrosophila melanogaster subgroupITS of rDNAD. simulansIsland speciesMolecular phylogenyDrosophila melanogasterPhylogenetic relationshipsSister statusIntraspecific polymorphismPhylogenetic standpointRelated speciesPhylogenetic inferenceMost speciesParallel evolutionIntraspecific 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
1979
Inbreeding and mating patterns inDrosophila pseudoobscura
Powell J, Morton L. Inbreeding and mating patterns inDrosophila pseudoobscura. Behavior Genetics 1979, 9: 425-429. PMID: 539969, DOI: 10.1007/bf01066981.Peer-Reviewed Original ResearchAnimalsDrosophilaFemaleInbreedingMalePolymorphism, GeneticSexual Behavior, AnimalSpecies SpecificityPOPULATION GENETICS OF DROSOPHILA AMYLASE. I. GENETIC CONTROL OF TISSUE-SPECIFIC EXPRESSION IN D. PSEUDOOBSCURA
Powell J, Lichtenfels J. POPULATION GENETICS OF DROSOPHILA AMYLASE. I. GENETIC CONTROL OF TISSUE-SPECIFIC EXPRESSION IN D. PSEUDOOBSCURA. Genetics 1979, 92: 603-612. PMID: 488706, PMCID: PMC1213979, DOI: 10.1093/genetics/92.2.603.Peer-Reviewed Original ResearchConceptsTissue-specific expressionAdult midgutThird chromosomeGenetic controlThird-chromosome inversionsDrosophila amylaseD. pseudoobscuraDrosophila pseudoobscuraD. melanogasterChromosome inversionsPopulation geneticsRegulatory genesSingle locusGenetic elementsAmy expressionGenesPseudoobscuraPartial linkageChromosomesMidgutExpressionEnzymeMelanogasterLociGenetics
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
1975
Population Genetics of Mexican Drosophila: I. Chromosomal variation in natural populations of Drosophila pseudoobscura from Central Mexico
DOBZHANSKY T, FELIX R, GUZMÁN J, LEVINE L, OLVERA O, POWELL J, DE LA ROSA M, SALCEDA V. Population Genetics of Mexican Drosophila: I. Chromosomal variation in natural populations of Drosophila pseudoobscura from Central Mexico. Journal Of Heredity 1975, 66: 203-206. PMID: 1165399, DOI: 10.1093/oxfordjournals.jhered.a108613.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsChromosome MappingChromosomesDrosophilaGenetics, PopulationKaryotypingMexicoPolymorphism, GeneticConceptsDrosophila pseudoobscura populationsCentral MexicoGene arrangementDrosophila pseudoobscuraThird chromosomeEvolutionary historyNatural populationsChromosomal variationPhylogenetic treePopulation geneticsSpecies areaSanta CruzPhyladSpeciesPseudoobscuraDrosophilaChromosomesGeneticsMexicoNorthern partPopulationCruzTrees
1974
Interaction of genetic loci: the effect of linkage disequilibria on hardy-weinberg expectations
Powell J. Interaction of genetic loci: the effect of linkage disequilibria on hardy-weinberg expectations. Heredity 1974, 32: 151-158. PMID: 4526038, DOI: 10.1038/hdy.1974.18.Peer-Reviewed Original Research
1973
APPARENT SELECTION OF ENZYME ALLELES IN LABORATORY POPULATIONS OF DROSOPHILA
Powell J. APPARENT SELECTION OF ENZYME ALLELES IN LABORATORY POPULATIONS OF DROSOPHILA. Genetics 1973, 75: 557-570. PMID: 4775750, PMCID: PMC1213028, DOI: 10.1093/genetics/75.3.557.Peer-Reviewed Original ResearchConceptsLaboratory populationsSignificant gene frequency changeGene frequency changesEsterase-5 locusAllele frequenciesEnzyme lociDrosophila willistoniNatural populationsWild populationsExperimental populationsEquilibrium frequencyThird locusApparent selectionEst-5Rare allelesEst-7LociEnzyme allelesAllelesMajor alleleWillistoniAllozymesDrosophilaChromosomesPopulation
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 frequenciesLocalitiesWillistoniGenes
1971
Genetic Polymorphisms in Varied Environments
Powell J. Genetic Polymorphisms in Varied Environments. Science 1971, 174: 1035-1036. PMID: 5120090, DOI: 10.1126/science.174.4013.1035.Peer-Reviewed Original ResearchMeSH KeywordsAllelesAnimalsDietDrosophilaElectrophoresisEnvironmentHeterozygotePolymorphism, GeneticTemperature
1970
Evidence of Heterosis Associated with an Enzyme Locus in a Natural Population of Drosophila*
Richmond R, Powell J. Evidence of Heterosis Associated with an Enzyme Locus in a Natural Population of Drosophila*. Proceedings Of The National Academy Of Sciences Of The United States Of America 1970, 67: 1264-1267. PMID: 5274455, PMCID: PMC283346, DOI: 10.1073/pnas.67.3.1264.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsDrosophilaElectrophoresisGene FrequencyGenotypeHeterozygoteOxidoreductasesPolymorphism, GeneticConceptsEnzyme lociNatural populationsWild-collected femalesCase of heterosisStarch gel electrophoresisWild populationsTetrazolium oxidaseDrosophila paulistorumHardy-Weinberg formulaFemale linesLociDrosophilaGel electrophoresisHeterosisSão JoséProgenyPopulationAllelesPolymorphismGenotypesHeterozygotesOxidase