Natural Genetic Variation
Mostrando 1-12 de 377 artigos, teses e dissertações.
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1. “A most bountiful source of inspiration:” Dobzhansky’s evolution of tropical populations, and the science and politics of genetic variation
Resumo Theodosius Dobzhansky tem sido estudado pelo modo como ele integrou o naturalismo de campo e a experimentação científica, que deram origem à síntese moderna, assim como a alavanca que ele deu ao conhecimento biológico para apoiar valores liberais e cosmopolitas em meio à Segunda Guerra Mundial e à Guerra Fria. Além disso, Dobzhansky tem sido
Hist. cienc. saude-Manguinhos. Publicado em: 2019-03
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2. Genetic diversity of populations of the dioecious Myrsine coriacea (Primulaceae) in the Atlantic Forest
ABSTRACT Although a species’ sexual system may influence the genetic diversity of its populations in their natural environment, there have been few such studies involving indigenous species of the Atlantic Forest. Here we study Myrsine coriacea, a dioecious tree widely used in reforestation programs despite a lack of information about its natural interpopu
Acta Bot. Bras.. Publicado em: 09/04/2018
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3. Genetic and ecological niche modeling of Calydorea crocoides (Iridaceae): an endemic species of Subtropical Highland Grasslands
Abstract Evolutionary analyses have been widely used for evaluation of genetic diversity of natural populations and correlate these data to the fitness of the species, especially in the case of threatened species. Calydorea crocoides occurs in a restricted area at altitudes from 800 to 1500 m in southern Brazil and is considered endangered. A study assessing
Genet. Mol. Biol.. Publicado em: 2018
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4. Spatial and temporal population genetic variation and structure of Nothotsuga longibracteata (Pinaceae), a relic conifer species endemic to subtropical China
Nothotsuga longibracteata, a relic and endangered conifer species endemic to subtropical China, was studied for examining the spatial-temporal population genetic variation and structure to understand the historical biogeographical processes underlying the present geographical distribution. Ten populations were sampled over the entire natural range of the spe
Genet. Mol. Biol.. Publicado em: 2013
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5. Investigating he signature of natural selection on exonic splicing regulators of the human genome / Análise dos sinais de seleção natural em reguladores de splicing exônicos do genoma humano
Splicing is the process by which introns are removed from a mRNA precursor and exons are ligated to form a mature mRNA. During this process several cis and trans factors are involved. Besides the canonical cis factors (e.g., splicing sites, branch point and polypyrimidine tract), Splicing Regulators - short sequences located in exons and introns - have an im
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/06/2012
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6. Partial VP1 sequencing of Brazilian infectious bursal disease virus strains
Infectious bursal disease virus (IBDV) is classified according to the antigenicity and virulence into classical virulent (cv), very virulent (vv), and antigenic variant strains. The molecular basis for the IBDV antigenic variation is well established and is associated to the capsid protein, VP2 (gene VP2 of segment A), whereas both VP2 and the RNA-dependent
Braz. J. Microbiol.. Publicado em: 2012-09
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7. Coping with genetic diversity: the contribution of pathogen and human genomics to modern vaccinology
Vaccine development faces major difficulties partly because of genetic variation in both infectious organisms and humans. This causes antigenic variation in infectious agents and a high interindividual variability in the human response to the vaccine. The exponential growth of genome sequence information has induced a shift from conventional culture-based to
Brazilian Journal of Medical and Biological Research. Publicado em: 2012-05
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8. Population genetic structure of Sisyrinchium micranthum Cav. (Iridaceae) in Itapuã State Park, Southern Brazil
Sisyrinchium micranthum Cav. is a member of the family Iridaceae, which is distributed over the American continent. In Brazil, this species is found, not only in disturbed areas and coastal regions, but is also very common in urban centers, such as public parks, during the spring. Chromosome counts for North American specimens are 2n = 32 and 2n = 48, wherea
Genetics and Molecular Biology. Publicado em: 02/02/2012
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9. Allozyme variation in a natural population of Stryphnodendron adstringens in the Rio Preto State Park, southeastern Brazil
Leaves and fruits from 63 Stryphnodendron adstringens trees were sampled in the Rio Preto State Park to analyze allozyme segregation, tissue specific expression of allozyme loci, and their genetic parameters. The enzyme systems ADH, EST, ACP, PGM, PGI, GDH, G6PDH, GOT, IDH, LAP, MDH, PER and SKDH were assessed by means of starch-gel electrophoresis. The poly
Braz. J. Bot.. Publicado em: 2012
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10. Variabilidade genética entre duas procedências de açaizeiro (Euterpe oleracea Martus).
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Boletim de Pesquisa Florestal. Publicado em: 2011
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11. Biochemical traits useful for the determination of genetic variation in a natural population of Myracrodruon urundeuva.
The objectives of this work were to analyze seeds from 20 trees of aroeira (Myracrodruon urundeuva Fr. All.) of a natural population located in the region of Selvíria, State of Mato Grosso do Sul, Brazil, in order to evaluate their protein, lipid and carbohydrate contents, and to estimate their genetic variation. A completely randomized experimental design
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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12. Worldwide genetic variation at the 3´-UTR region of the LDLR gene : possible influence of natural selection
The low density lipoprotein receptor gene (LDLR) contains many Alu insertions, and is especially Alu-rich at its 3 -untranslated region (3 -UTR). Previous studies suggested that the LDLR 3 -UTR could regulate gene expression by the stabilization of its mRNA. Given the faster Alu evolutionary rate, and wondering about its consequences in a possibly regulatory
Publicado em: 2011