Nucleotide Divergence
Mostrando 13-24 de 504 artigos, teses e dissertações.
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13. Desenvolvimento de um método de PCR específico para detecção de Aspergillus Flavus aflatoxigênico em grãos brasileiros
In general, foods are extremely susceptible to contamination by mycotoxin-producing fungi that affect human and animal health, with major losses common in agricultural production in Brazil. Aflatoxins are considered the most important group of mycotoxins, because of their high toxicity, hepatic-cancer-inducing properties, and common occurrence in various gra
Publicado em: 2009
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14. Evolução do reparo por excisão de nucleotídeo
The phylogeny is one of the main activities of the modern taxonomists and a way to reconstruct the history of the life through comparative analysis of these sequences stored in their genomes aimed find any justification for the origin or evolution of them. Among the sequences with a high level of conservation are the genes of repair because it is important f
Publicado em: 2008
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15. Genética molecular de populações de Alternaria solani no Brasil / Molecular population genetics of Alternaria solani in Brazil
The analysis of the genetic structure of the population of Alternaria solani is an important component of the molecular epidemiology potato (Po) and tomato (To) early blight. Isolates were sampled from the Northeast, Central-West, Southeast, and South regions of Brazil. AFLP and RAPD markers were used to estimate genetic diversity. A multilocus combined data
Publicado em: 2008
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16. Filogeografia, morfometria e distribuição geográfica potencial de populações de Rhodnius neglectus (Hemiptera, Reduviidae) no Brasil
Sylvatic triatomines of the genus Rhodnius commonly fly into houses in Latin America, maintaining the risk of Chagas disease transmission. In this thesis, phylogeographical, morphological and potential geographical distribution analyses of Rhodnius populations in central Brazil were carried out, focusing in R. neglectus, the major species found in palm trees
Publicado em: 2008
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17. Genetic variability of Aedes aegypti in the Americas using a mitochondrial gene: evidence of multiple introductions
To analyze the genetic relatedness and phylogeographic structure of Aedes aegypti, we collected samples from 36 localities throughout the Americas (Brazil, Peru, Venezuela, Guatemala, US), three from Africa (Guinea, Senegal, Uganda), and three from Asia (Singapore, Cambodia, Tahiti). Amplification and sequencing of a fragment of the mitochondrial NADH dehydr
Memórias do Instituto Oswaldo Cruz. Publicado em: 05/07/2007
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18. Challenges and prospects of population genetic studies in terns (Charadriiformes, Aves)
Little information is available about the population structure of communally nesting terns (Sternidae) and skimmers (Rynchopidae) throughout the world. In order to fill this gap, a survey of molecular markers was carried out for six species of terns (Anous stolidus, Sterna hirundinacea, S. fuscata, S. superciliaris, Thalasseus maximus and Phaetusa simplex) a
Genetics and Molecular Biology. Publicado em: 2007
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19. Estudo de dois grupos de elementos de cana-de-açúcar homológos à superfamília hAT de transposons / Studies on hAT-like transposases in sugarcane superfamily
Transposable elements (TEs) are mobile genetic sequences. Their mutagenic capacity makes them important sources of variation in the genomes. These elements have another important evolutionary role as donors of functional protein domains in the formation of new genes. 276 cDNA clones homologous to TEs were previously identified in the Brazilian Sugarcane Expr
Publicado em: 2007
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20. Analysis of population genetic structure of Prochilodus lineatus (Teleostei, Characiformes, Prochilodontidae) in the Rio Grande basin, São Paulo, Brazil / Análise da estrutura genética populacional do curimbatá (Prochilodus lineatus, Characiformes: Prochilodontidae) na região da bacia do Rio Grande, SP.
Prochilodus lineatus has a commercial importance in the Brazilian freshwater fishing, especially in the Rio Grande basin. Several studies have been done with P. lineatus in this area, including those delimiting populations. Since then, the Rio Grande basin has been changed due to environmental impacts caused by construction of several dams. The most expressi
Publicado em: 2006
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21. Estudo de dois genes da imunidade inata (MBL â 2 e o receptor CCR5) na transmissÃo materno infantil do HIV-1
The Acquired Immunodeficiency Syndrome (AIDS) is a disease caused by Human immunodeficiency Virus (HIV) and is characterized by cell destruction of immunologic system, as macrophages and T CD4. According statistics by Joint United Nations Program on HIV/AIDS (UNAIDS) approximately 42 millions of people are living with HIV worldwide and only in Brazil there a
Publicado em: 2006
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22. Genealogy, distribution and history of NADH4 haplotypes in Aedes (Stegomyia) aegypti (DIPTERA: CULICIDAE) populations from Brazil. / Genealogia, distribuição e história de haplótipos do gene mitocondrial NADH 4 em populações do Aedes (Stegomyia) aegypti (Diptera: Culicidae) no Brasil
Knowledge about intrapopulacional variation of biological vectors is critical for understanding the dynamics of the transmission of an infectious agent. The major objective of the present study is to characterize the variability of a gene fragment, which codes for the subunit 4 of the mitochondrial gene of the Nicotinamide Adenine Dinucleotide Dehydrogenase
Publicado em: 2005
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23. Investigation about the presence of retrotransposons in natural populations of the cardini group of the Genus Drosophila (Diptera: Drosophilidae) from the South of Brazil / Investigação sobre a presença de retrotransposons em populações naturais do grupo cardini do gênero Drosophila (Diptera: Drosophilidae) do Sul do Brasil
The cardini group is part of the genus Drosophila and has its geographical distribution in the Neotropics. Some previous studies revealed the high variability in species of this group of flies. Transposable elements are recognized as capable of high potential for generation of genetic variability in the genomes of the organisms where they are present. Consid
Publicado em: 2005
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24. Characterization of two full-sized P elements from Drosophila sturtevanti and Drosophila prosaltans
Previously, only partial P element sequences have been reported in the saltans group of Drosophila but in this paper we report two complete P element sequences from Drosophila sturtevanti and Drosophila prosaltans. The divergence of these sequences from the canonical P element of Drosophila melanogaster is about 31% at the nucleotide level. Phylogenetic anal
Genetics and Molecular Biology. Publicado em: 2004