Base de dados : MEDLINE
Pesquisa : G05.330.159 [Categoria DeCS]
Referências encontradas : 4073 [refinar]
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[PMID]:29258497
[Au] Autor:Granroth-Wilding H; Primmer C; Lindqvist M; Poutanen J; Thalmann O; Aspi J; Harmoinen J; Kojola I; Laaksonen T
[Ad] Endereço:Department of Biology, University of Turku, Turku, Finland. hanna@granroth-wilding.co.uk.
[Ti] Título:Non-invasive genetic monitoring involving citizen science enables reconstruction of current pack dynamics in a re-establishing wolf population.
[So] Source:BMC Ecol;17(1):44, 2017 Dec 19.
[Is] ISSN:1472-6785
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Carnivores are re-establishing in many human-populated areas, where their presence is often contentious. Reaching consensus on management decisions is often hampered by a dispute over the size of the local carnivore population. Understanding the reproductive dynamics and individual movements of the carnivores can provide support for management decisions, but individual-level information can be difficult to obtain from elusive, wide-ranging species. Non-invasive genetic sampling can yield such information, but makes subsequent reconstruction of population history challenging due to incomplete population coverage and error-prone data. Here, we combine a collaborative, volunteer-based sampling scheme with Bayesian pedigree reconstruction to describe the pack dynamics of an establishing grey wolf (Canis lupus) population in south-west Finland, where wolf breeding was recorded in 2006 for the first time in over a century. RESULTS: Using DNA extracted mainly from faeces collected since 2008, we identified 81 individual wolves and assigned credible full parentages to 70 of these and partial parentages to a further 9, revealing 7 breeding pairs. Individuals used a range of strategies to obtain breeding opportunities, including dispersal to established or new packs, long-distance migration and inheriting breeding roles. Gene flow occurred between all packs but inbreeding events were rare. CONCLUSIONS: These findings demonstrate that characterizing ongoing pack dynamics can provide detailed, locally-relevant insight into the ecology of contentious species such as the wolf. Involving various stakeholders in data collection makes these results more likely to be accepted as unbiased and hence reliable grounds for management decisions.
[Mh] Termos MeSH primário: Conservação dos Recursos Naturais
Fluxo Gênico
Lobos/fisiologia
[Mh] Termos MeSH secundário: Animais
Teorema de Bayes
Coleta de Dados
Feminino
Finlândia
Masculino
Linhagem
Dinâmica Populacional
Lobos/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171221
[St] Status:MEDLINE
[do] DOI:10.1186/s12898-017-0154-8


  2 / 4073 MEDLINE  
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[PMID]:29107154
[Au] Autor:Liu P; Xu L; Xu SL; Martínez A; Chen H; Cheng D; Dumont HJ; Han BP; Fontaneto D
[Ad] Endereço:Jinan University, Department of Ecology, Guangzhou 510632, China.
[Ti] Título:Species and hybrids in the genus Diaphanosoma Fischer, 1850 (Crustacea: Branchiopoda: Cladocera).
[So] Source:Mol Phylogenet Evol;118:369-378, 2018 Jan.
[Is] ISSN:1095-9513
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Cladocerans are well-studied planktonic crustaceans, especially those of the genus Daphnia in which interesting evolutionary questions have been addressed on speciation processes. The aim of the present study is to demonstrate that other genera of cladocerans show similar levels of cryptic diversity, intraspecific gene flow, and thus become useful model systems for comparison. In order to do so, we chose the genus Diaphanosoma, widespread in tropical and temperate areas. We started with a survey of species diversity in the genus Diaphanosoma in Asia using a morphological approach, then obtained sequences from a mitochondrial and a nuclear marker from multiple individuals of different species, performed tests on DNA taxonomy and molecular phylogenies, and assessed the role of hybridization in explaining the cases of mitonuclear discordance. The results are that cryptic diversity occurs in Diaphanosoma, and mitonuclear discordance was found in about 6% of the sequenced animals. Past hybridization is supported as the most likely explanation for the discordance: no evidence was found of first generation hybrids with heterozygous sequences. Our analysis on patterns of genetic diversity in Diaphanosoma supports similarities and differences with what is known in Daphnia.
[Mh] Termos MeSH primário: Cladóceros/classificação
[Mh] Termos MeSH secundário: Animais
Sequência de Bases
Evolução Biológica
Cladóceros/genética
DNA/química
DNA/isolamento & purificação
DNA/metabolismo
DNA Mitocondrial/genética
Complexo IV da Cadeia de Transporte de Elétrons/química
Complexo IV da Cadeia de Transporte de Elétrons/classificação
Complexo IV da Cadeia de Transporte de Elétrons/genética
Fluxo Gênico
Variação Genética
Hibridização Genética
Filogenia
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Mitochondrial); 9007-49-2 (DNA); EC 1.9.3.1 (Electron Transport Complex IV)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180220
[Lr] Data última revisão:
180220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171107
[St] Status:MEDLINE


  3 / 4073 MEDLINE  
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[PMID]:28963083
[Au] Autor:Eldridge RA; Achmadi AS; Giarla TC; Rowe KC; Esselstyn JA
[Ad] Endereço:Museum of Natural Science, Louisiana State University, 119 Foster Hall, Baton Rouge, LA 70803, USA; Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA. Electronic address: therealryaneldridge@gmail.com.
[Ti] Título:Geographic isolation and elevational gradients promote diversification in an endemic shrew on Sulawesi.
[So] Source:Mol Phylogenet Evol;118:306-317, 2018 Jan.
[Is] ISSN:1095-9513
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Phylogeographic research on endemic primates and amphibians inhabiting the Indonesian island of Sulawesi revealed the existence of seven areas of endemism (AoEs). Here, we use phylogenetic and population genetic analyses of one mitochondrial gene and 15 nuclear loci to assess geographic patterns of genetic partitioning in a shrew (Crocidura elongata) that is endemic to Sulawesi, but occurs across the island. We uncover substantial genetic diversity in this species both between and within AoEs, but we also identify close relationships between populations residing in different AoEs. One of the earliest divergences within C. elongata distinguishes a high-elevation clade from low-elevation clades. In addition, on one mountain, we observe three distinct genetic groups from low, middle, and high elevations, suggesting divergence along a single elevational gradient. In general, our results show that C. elongata, like several other Sulawesi endemic taxa, harbors extensive genetic diversity. This diversity is structured in part by known AoE boundaries, but also by elevational gradients and geographic isolation within AoEs.
[Mh] Termos MeSH primário: Musaranhos/classificação
[Mh] Termos MeSH secundário: Animais
Sequência de Bases
DNA/química
DNA/isolamento & purificação
DNA/metabolismo
Fluxo Gênico
Variação Genética
Genética Populacional
Indonésia
Ilhas
Mitocôndrias/genética
Filogenia
Filogeografia
Alinhamento de Sequência
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
9007-49-2 (DNA)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180220
[Lr] Data última revisão:
180220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171001
[St] Status:MEDLINE


  4 / 4073 MEDLINE  
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[PMID]:29372805
[Au] Autor:Poplavskaya NS; Lebedev VS; Bannikova AA; Belokon MM; Belokon YS; Pavlenko MV; Korablev VP; Kartavtseva IV; Bazhenov YA; Surov AV
[Ti] Título:[Microsatellite loci variation and investigation of gene flow between two karyoforms of Cricetulus barabensis sensu lato (Rodentia, Cricetidae)].
[So] Source:Genetika;53(1):63-78, 2017 Jan.
[Is] ISSN:0016-6758
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:We examine the diversity of six microsatellite loci and partial RAG1 exon of "barabensis" and "pseudogriseus" karyoforms in Cricetulus barabensis sensu lato species complex. A total of 435 specimens from 68 localities ranging from Altai to the Far East are investigated. The results of the population structure analysis (factor analysis and NJ tree based on Nei genetic distances) support subdivision into two well-differentiated clusters corresponding to the two karyoforms. These karyoforms are also well differentiated by the level of microsatellite variability. In several "barabensis" specimens, we found microsatellite alleles that are common in "pseudogriseus" populations but are otherwise absent in "barabensis." Most of these specimens originate from a single population in one of the zones of potential contact between karyoforms, Kharkhorin in Central Mongolia. These molecular results are consistent with previously published karyological data in suggesting that rare hybridization events between the two chromosomal races occur in nature.
[Mh] Termos MeSH primário: Cricetulus/genética
Fluxo Gênico
Loci Gênicos
Variação Genética
Repetições de Microssatélites
[Mh] Termos MeSH secundário: Animais
Sibéria
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180216
[Lr] Data última revisão:
180216
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180127
[St] Status:MEDLINE


  5 / 4073 MEDLINE  
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[PMID]:28742230
[Au] Autor:Maguilla E; Escudero M; Hipp AL; Luceño M
[Ad] Endereço:Universidad Pablo de Olavide, Seville, Spain.
[Ti] Título:Allopatric speciation despite historical gene flow: Divergence and hybridization in Carex furva and C. lucennoiberica (Cyperaceae) inferred from plastid and nuclear RAD-seq data.
[So] Source:Mol Ecol;26(20):5646-5662, 2017 Oct.
[Is] ISSN:1365-294X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Gene flow among incipient species can act as a creative or destructive force in the speciation process, generating variation on which natural selection can act while, potentially, undermining population divergence. The flowering plant genus Carex exhibits a rapid and relatively recent radiation with many species limits still unclear. This is the case with the Iberian Peninsula (Spain and Portugal)-endemic C. lucennoiberica, which lay unrecognized within Carex furva until its recent description as a new species. In this study, we test how these species were impacted by interspecific gene flow during speciation. We sampled the full range of distribution of C. furva (15 individuals sampled) and C. lucennoiberica (88 individuals), sequenced two cpDNA regions (atpI-atpH, psbA-trnH) and performed genomic sequencing of 45,100 SNPs using restriction site-associated DNA sequencing (RAD-seq). We utilized a set of partitioned D-statistic tests and demographic analyses to study the degree and direction of introgression. Additionally, we modelled species distributions to reconstruct changes in range distribution during glacial and interglacial periods. Plastid, nuclear and morphological data strongly support divergence between species with subsequent gene flow. Combined with species distribution modelling, these data support a scenario of allopatry leading to species divergence, followed by secondary contact and gene flow due to long-distance dispersal and/or range expansions and contractions in response to Quaternary glacial cycles. We conclude that this is a case of allopatric speciation despite historical secondary contacts, which could have temporally influenced the speciation process, contributing to the knowledge of forces that are driving or counteracting speciation.
[Mh] Termos MeSH primário: Carex (Planta)/classificação
Fluxo Gênico
Especiação Genética
Hibridização Genética
[Mh] Termos MeSH secundário: Núcleo Celular/genética
DNA de Cloroplastos/genética
Haplótipos
Filogenia
Portugal
Seleção Genética
Análise de Sequência de DNA
Espanha
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Chloroplast)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170726
[St] Status:MEDLINE
[do] DOI:10.1111/mec.14253


  6 / 4073 MEDLINE  
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[PMID]:27775197
[Au] Autor:Des Roches S; Sollmann R; Calhoun K; Rothstein AP; Rosenblum EB
[Ad] Endereço:Department of Environmental Science, Policy, & Management, University of California, Berkeley, 54 Mulford Hall, Berkeley, CA, 94720, USA.
[Ti] Título:Survival by genotype: patterns at Mc1r are not black and white at the White Sands ecotone.
[So] Source:Mol Ecol;26(1):320-329, 2017 Jan.
[Is] ISSN:1365-294X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Measuring links among genotype, phenotype and survival in the wild has long been a focus of studies of adaptation. We conducted a 4-year capture-recapture study to measure survival by genotype and phenotype in the Southwestern Fence Lizard (Sceloporus cowlesi) at the White Sands ecotone (transition area between white sands and dark soil habitats). We report several unanticipated findings. First, in contrast with previous work showing that cryptic blanched coloration in S. cowlesi from the heart of the dunes is associated with mutations in the melanocortin-1 receptor gene (Mc1r), ecotonal S. cowlesi showed minimal association between colour phenotype and Mc1r genotype. Second, the frequency of the derived Mc1r allele in ecotonal S. cowlesi appeared to decrease over time. Third, our capture-recapture data revealed a lower survival rate for S. cowlesi individuals with the derived Mc1r allele. Thus, our results suggest that selection at the ecotone may have favoured the wild-type allele in recent years. Even in a system where a genotype-phenotype association appeared to be black and white, our study suggests that additional factors - including phenotypic plasticity, epistasis, pleiotropy and gene flow - may play important roles at the White Sands ecotone. Our study highlights the importance of linking molecular, genomic and organismal approaches for understanding adaptation in the wild. Furthermore, our findings indicate that dynamics of natural selection can be particularly complex in transitional habitats like ecotones and emphasize the need for future research that examines the patterns of ongoing selection in other ecological 'grey' zones.
[Mh] Termos MeSH primário: Lagartos/genética
Pigmentação/genética
Receptor Tipo 1 de Melanocortina/genética
[Mh] Termos MeSH secundário: Alelos
Animais
Ecossistema
Epistasia Genética
Fluxo Gênico
Pleiotropia Genética
Genética Populacional
Genótipo
Fenótipo
Seleção Genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Receptor, Melanocortin, Type 1)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180129
[Lr] Data última revisão:
180129
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161025
[St] Status:MEDLINE
[do] DOI:10.1111/mec.13894


  7 / 4073 MEDLINE  
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[PMID]:28448508
[Au] Autor:Jeong C; Peter BM; Basnyat B; Neupane M; Beall CM; Childs G; Craig SR; Novembre J; Di Rienzo A
[Ad] Endereço:Department of Human Genetics, University of Chicago, Chicago, IL, United States of America.
[Ti] Título:A longitudinal cline characterizes the genetic structure of human populations in the Tibetan plateau.
[So] Source:PLoS One;12(4):e0175885, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Indigenous populations of the Tibetan plateau have attracted much attention for their good performance at extreme high altitude. Most genetic studies of Tibetan adaptations have used genetic variation data at the genome scale, while genetic inferences about their demography and population structure are largely based on uniparental markers. To provide genome-wide information on population structure, we analyzed new and published data of 338 individuals from indigenous populations across the plateau in conjunction with worldwide genetic variation data. We found a clear signal of genetic stratification across the east-west axis within Tibetan samples. Samples from more eastern locations tend to have higher genetic affinity with lowland East Asians, which can be explained by more gene flow from lowland East Asia onto the plateau. Our findings corroborate a previous report of admixture signals in Tibetans, which were based on a subset of the samples analyzed here, but add evidence for isolation by distance in a broader geospatial context.
[Mh] Termos MeSH primário: Grupo com Ancestrais do Continente Asiático/genética
Genoma Humano
[Mh] Termos MeSH secundário: Fluxo Gênico
Genética Populacional
Genótipo
Seres Humanos
Análise de Componente Principal
Tibet
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:180126
[Lr] Data última revisão:
180126
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170428
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0175885


  8 / 4073 MEDLINE  
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[PMID]:29261733
[Au] Autor:Liu X; Cao Y; Xue T; Wu R; Zhou Y; Zhou C; Zanatta DT; Ouyang S; Wu X
[Ad] Endereço:Poyang Lake Key Laboratory of Environment and Resource Utilization (Nanchang University), Ministry of Education, Nanchang, People's Republic of China.
[Ti] Título:Genetic structure and diversity of Nodularia douglasiae (Bivalvia: Unionida) from the middle and lower Yangtze River drainage.
[So] Source:PLoS One;12(12):e0189737, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The Yangtze River drainage in China is among the most species rich rivers for freshwater mussels (order Unionida) on Earth with at least 68 species known. The freshwater mussels of the Yangtze River face a variety of threats with indications that species are declining in abundance and area of occupancy. This study represents the first analyses of the genetic structure and diversity for the common and widespread freshwater mussel Nodularia douglasiae based on microsatellite DNA genotypes and mitochondrial DNA sequences. Phylogenetic analysis a fragment of the COI mitochondrial gene indicated that N. douglasiae collected from across the middle and lower Yangtze River drainage are monophyletic with N. douglasiae from Japan, Russia, and South Korea. The results of the analysis of both the mtDNA and microsatellite datasets indicated that the seven collection locations of N. douglasiae in the middle and lower Yangtze River drainage showed high genetic diversity, significant genetic differentiation and genetic structure, and stable population dynamics over time. Moreover, we found that the connections among tributaries rivers and lakes in the Yangtze River drainage were important in maintaining gene flow among locations that N. douglasiae inhabits. An understanding of the genetic structure and diversity of a widespread species like N. douglasiae could be used as a surrogate to better understand the populations of other freshwater mussel species that are more rare in the Yangtze River drainage. At the same time, these results could provide a basis for the protection of genetic diversity and management of unionid mussels diversity and other aquatic organisms in the system.
[Mh] Termos MeSH primário: Drenagem Sanitária
Variação Genética
Rios
Unionidae/genética
[Mh] Termos MeSH secundário: Animais
Sequência de Bases
Teorema de Bayes
China
DNA Mitocondrial/genética
Complexo IV da Cadeia de Transporte de Elétrons/genética
Fluxo Gênico
Genética Populacional
Genótipo
Geografia
Haplótipos/genética
Repetições de Microssatélites/genética
Filogenia
Análise de Componente Principal
Tamanho da Amostra
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Mitochondrial); EC 1.9.3.1 (Electron Transport Complex IV)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180108
[Lr] Data última revisão:
180108
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171221
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189737


  9 / 4073 MEDLINE  
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[PMID]:28464851
[Au] Autor:Millwood R; Nageswara-Rao M; Ye R; Terry-Emert E; Johnson CR; Hanson M; Burris JN; Kwit C; Stewart CN
[Ad] Endereço:Department of Plant Sciences, University of Tennessee, 252 Ellington Plant Sciences, 2431 Joe Johnson Dr., Knoxville, TN, 37996, USA.
[Ti] Título:Pollen-mediated gene flow from transgenic to non-transgenic switchgrass (Panicum virgatum L.) in the field.
[So] Source:BMC Biotechnol;17(1):40, 2017 05 02.
[Is] ISSN:1472-6750
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Switchgrass is C perennial grass species that is being developed as a cellulosic bioenergy feedstock. It is wind-pollinated and considered to be an obligate outcrosser. Genetic engineering has been used to alter cell walls for more facile bioprocessing and biofuel yield. Gene flow from transgenic cultivars would likely be of regulatory concern. In this study we investigated pollen-mediated gene flow from transgenic to nontransgenic switchgrass in a 3-year field experiment performed in Oliver Springs, Tennessee, U.S.A. using a modified Nelder wheel design. The planted area (0.6 ha) contained sexually compatible pollen source and pollen receptor switchgrass plants. One hundred clonal switchgrass 'Alamo' plants transgenic for an orange-fluorescent protein (OFP) and hygromycin resistance were used as the pollen source; whole plants, including pollen, were orange-fluorescent. To assess pollen movement, pollen traps were placed at 10 m intervals from the pollen-source plot in the four cardinal directions extending to 20 m, 30 m, 30 m, and 100 m to the north, south, west, and east, respectively. To assess pollination rates, nontransgenic 'Alamo 2' switchgrass clones were planted in pairs adjacent to pollen traps. RESULTS: In the eastward direction there was a 98% decrease in OFP pollen grains from 10 to 100 m from the pollen-source plot (Poisson regression, F1,8 = 288.38, P < 0.0001). At the end of the second and third year, 1,820 F seeds were collected from pollen recipient-plots of which 962 (52.9%) germinated and analyzed for their transgenic status. Transgenic progeny production detected in each pollen-recipient plot decreased with increased distance from the edge of the transgenic plot (Poisson regression, F1,15 = 12.98, P < 0.003). The frequency of transgenic progeny detected in the eastward plots (the direction of the prevailing wind) ranged from 79.2% at 10 m to 9.3% at 100 m. CONCLUSIONS: In these experiments we found transgenic pollen movement and hybridization rates to be inversely associated with distance. However, these data suggest pollen-mediated gene flow is likely to occur up to, at least, 100 m. This study gives baseline data useful to determine isolation distances and other management practices should transgenic switchgrass be grown commercially in relevant environments.
[Mh] Termos MeSH primário: Fluxo Gênico
Genes de Plantas
Panicum/genética
Pólen/genética
[Mh] Termos MeSH secundário: Proteínas Luminescentes/genética
Proteínas Luminescentes/metabolismo
Panicum/crescimento & desenvolvimento
Panicum/fisiologia
Plantas Geneticamente Modificadas/genética
Plantas Geneticamente Modificadas/crescimento & desenvolvimento
Plantas Geneticamente Modificadas/fisiologia
Distribuição de Poisson
Sementes/crescimento & desenvolvimento
Sementes/fisiologia
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Luminescent Proteins)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171226
[Lr] Data última revisão:
171226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170504
[St] Status:MEDLINE
[do] DOI:10.1186/s12896-017-0363-4


  10 / 4073 MEDLINE  
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[PMID]:28748565
[Au] Autor:Portik DM; Leaché AD; Rivera D; Barej MF; Burger M; Hirschfeld M; Rödel MO; Blackburn DC; Fujita MK
[Ad] Endereço:Department of Biology, The University of Texas at Arlington, Arlington, TX, USA.
[Ti] Título:Evaluating mechanisms of diversification in a Guineo-Congolian tropical forest frog using demographic model selection.
[So] Source:Mol Ecol;26(19):5245-5263, 2017 Oct.
[Is] ISSN:1365-294X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The accumulation of biodiversity in tropical forests can occur through multiple allopatric and parapatric models of diversification, including forest refugia, riverine barriers and ecological gradients. Considerable debate surrounds the major diversification process, particularly in the West African Lower Guinea forests, which contain a complex geographic arrangement of topographic features and historical refugia. We used genomic data to investigate alternative mechanisms of diversification in the Gaboon forest frog, Scotobleps gabonicus, by first identifying population structure and then performing demographic model selection and spatially explicit analyses. We found that a majority of population divergences are best explained by allopatric models consistent with the forest refugia hypothesis and involve divergence in isolation with subsequent expansion and gene flow. These population divergences occurred simultaneously and conform to predictions based on climatically stable regions inferred through ecological niche modelling. Although forest refugia played a prominent role in the intraspecific diversification of S. gabonicus, we also find evidence for potential interactions between landscape features and historical refugia, including major rivers and elevational barriers such as the Cameroonian Volcanic Line. We outline the advantages of using genomewide variation in a model-testing framework to distinguish between alternative allopatric hypotheses, and the pitfalls of limited geographic and molecular sampling. Although phylogeographic patterns are often species-specific and related to life-history traits, additional comparative studies incorporating genomic data are necessary for separating shared historical processes from idiosyncratic responses to environmental, climatic and geological influences on diversification.
[Mh] Termos MeSH primário: Anuros/classificação
Biodiversidade
Evolução Biológica
Filogenia
[Mh] Termos MeSH secundário: Animais
Camarões
Congo
DNA Mitocondrial/genética
Guiné Equatorial
Florestas
Gabão
Fluxo Gênico
Modelos Biológicos
Nigéria
Filogeografia
Clima Tropical
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Mitochondrial)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171220
[Lr] Data última revisão:
171220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170728
[St] Status:MEDLINE
[do] DOI:10.1111/mec.14266



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