In Situ Variability
Mostrando 13-24 de 100 artigos, teses e dissertações.
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13. A remarkable autosomal heteromorphism in Pseudoryzomys simplex 2n = 56; FN = 54-55 (Rodentia, Sigmodontinae)
Pseudoryzomys simplex, the false rice rat, is a monotypic genus of the Oryzomyini tribe (Sigmodontinae) distributed in part of Bolivia, Paraguay, Argentina and Brazil. Its diploid number has been described as 56 acrocentric chromosomes decreasing in size and no karyotype figure has been depicted. Herein, we present karyotypic data on P. simplex, including ch
Genet. Mol. Biol.. Publicado em: 2013
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14. Citogenética comparativa em espécies de Hypostomus (Siluriformes, Loricariidae, Hypostominae) : contribuição da fração repetitiva do genoma para a diversidade cromossômica do grupo
Hypostomus is the widest genus of the armored catfishes in South America. This group presents a great diversity in color pattern and morphology, and shows not conservative chromosomal features. Different classes of repetitive DNAs have distinct evolutionary dynamics in the genome of eukaryotes. Therefore, analyses and distribution of these sequences in chrom
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/11/2012
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15. Análise da influência da condutividade hidráulica saturada dos solos nos escorregamentos rasos na bacia do rio Guaxinduba (SP) / Analysis of the influence of saturated hydraulic conductivity from soils in the shallow landslides in the Basin of the River Guaxinduba (SP)
The prediction of landslides-prone areas has as fundamental step researching controlling factors and failure mechanisms. Some of these properties, such as the physical and hydrological soil properties are crucial to the instability of slopes subject to intense rainfall events. One of these properties is the saturated hydraulic conductivity, whose behavior ca
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/07/2012
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16. Monitoramento genético da população Ex Situ da jacutinga (Aburria jacutinga, Aves, Cracidae) como subsídio para a conservação da espécie
Several critically endangered species and subspecies have been saved from extinction in recent years by Ex Situ conservation strategies. However, captive populations are generally small and exposed to the effects of genetic drift, inbreeding and founder effects. Thus, a major challenge for long-term reproduction of these animals is to reduce the loss of hete
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/06/2012
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17. Efeitos da rugosidade de substratos, distúrbios físicos e organismos pastejadores na estruturação de assembleias de algas bênticas e na biomassa perifítica em um riacho subtropical : uma abordagem experimental
Os estudos apresentados nesta tese tiveram como objetivo compreender aspectos da organização de assembleias de algas bênticas em riachos. Foi avaliado especificamente o efeito da heterogeneidade de habitat na escala de rugosidade de substratos e sua interação com distúrbios hidrológicos e organismos pastejadores (grazers). Utilizou-se uma abordagem ex
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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18. Caracterização da diversidade genética de inhame (Dioscorea alata) utilizando marcadores microssatélites / Genetic diversity characterization of water yam (Dioscorea alata L.) with microsatellites markers
O gênero Dioscorea é o mais amplo da família Dioscoreaceae, apresentando cerca de 600 espécies distribuídas, sobretudo, nos trópicos, com grande importância na alimentação, principalmente na África Ocidental, na Sudeste Asiático, no Caríbe e em alguns países da América do Sul. No Brasil, algumas espécies de inhame (Dioscorea spp.), juntamente
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2011
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19. Genetic diversity of American wild rice species
Studies on genetic diversity and genetic structure of natural populations are important in order to define strategies for in situ and ex situ conservation actions and for plant pre-breeding programs. Aiming to assess the genetic diversity and genetic structure of three wild American Oryza species with isozyme markers, 14 populations of the diploid O. glumaep
Scientia Agricola. Publicado em: 2011-08
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20. Morphological variation and isozyme diversity in Dioscorea alata L. landraces from Vale do Ribeira, Brazil
Traditional growers of the Vale do Ribeira, São Paulo State, grow and make use of several D. alata landraces. This study assessed the genetic diversity of 16 landraces, using isozymatic and morphological markers and comparing them with 19 commercial varieties of D. alata. Their distribution in different levels of organization such as households and communit
Scientia Agricola. Publicado em: 2011-08
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21. Comparative analysis of microsatellite variability in five macaw species (Psittaciformes, Psittacidae): application for conservation
Cross-amplification was tested and variability in microsatellite primers (designed for Neotropical parrots) compared, in five macaw species, viz., three endangered blue macaws (Cyanopsitta spixii [extinct in the wild], Anodorhynchus leari [endangered] and Anodorhynchus hyacinthinus [vulnerable]), and two unthreatened red macaws (Ara chloropterus and Ara maca
Genetics and Molecular Biology. Publicado em: 08/04/2011
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22. Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes)
Dados cariotípicos são apresentados para quatro espécies da família Pimelodidae. Todas apresentaram o mesmo número diploide, 2n = 56 cromossomos, com diferenças nas fórmulas cariotípicas. As espécies aqui analisadas mostraram pouca quantidade de heterocromatina localizada preferencialmente na região centromérica e telomérica de alguns cromossosmo
Neotropical Ichthyology. Publicado em: 04/02/2011
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23. In situ and genetic characterization of Gossypium barbadense populations from the states of Pará and Amapá, Brazil.
Abstract ? The objective of this work was to characterize the populations of Gossypium barbadense in the states of Amapá and Pará, Brazil. In situ characterization was conducted through interviews with the owners of the plants and environmental observations. Leaf or petal tissue as well as seed samples were collected for genetic characterization by single
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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24. Hematological abnormalities and 22q11.2 deletion syndrome
The 22q11.2 deletion syndrome (22q11DS) is a common genetic disease characterized by broad phenotypic variability. Despite the small number of studies describing hematological alterations in individuals with 22q11DS, it appears that these abnormalities are more frequent than previously imagined. Thus, the objective of our study was to report on a patient wit
Revista Brasileira de Hematologia e Hemoterapia. Publicado em: 2011