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	Provedor de dados Genet. Mol. Biol. (6) Acta Amazonica (1) Autor Porto,Jorge Ivan Rebelo (7) Feldberg,Eliana (5) Gross,Maria Claudia (2) Benzaquem,Denise Corrêa (1) Litaiff,Eleilza de Castro (1) Loreto,Elgion Lúcio Silva (1) Nakayama,Celeste Mutuko (1) Oliveira,Ila Maria de Aguiar (1) Ortiz,Mauro Freitas (1) Santos,Elen Bethlen Pedraça dos (1) Schneider,Carlos Henrique (1) Silva,Adailton Moreira da (1) Tadei,Wanderli Pedro (1) Teixeira,Aylton Saturnino (1) Terencio,Maria Leandra (1) Valentim,Francisco Carlos Souza (1) Valentim,Francisco Carlos de Souza (1) Zuanon,Jansen Alfredo Sampaio (1) Mais... Palavra-chave Karyotype (2) Amazon (1) Amazonian (1) Bioassays (1) Biolarvicides (1) Brazilian Amazon basin (1) Chromosomal rearrangements (1) Chromosome marker (1) Cytogenetics (1) Cytotaxonomy (1) Elasmobranchs (1) Entomopathogens (1) Esterase enzymes (1) Fish cytogenetics (1) Heteromorphic sex chromosome system (1) Horizontal gene transfer (1) IS (1) Insertion sequences (1) Karyotype differentiation (1) Karyotypic diversity (1) Mais... Tipo do documento Info:eu-repo/semantics/article (7) Ano 2019 (1) 2008 (3) 2007 (1) 2006 (1) 1999 (1) País Brazil (7) Idioma Inglês (7)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 7 Primeira ... 1 ... Última Analysis of toxicity on Bacillus sphaericus from amazonian soils to Anopheles darlingi and Culex quinquefasciatus larvae Acta Amazonica Litaiff,Eleilza de Castro; Tadei,Wanderli Pedro; Porto,Jorge Ivan Rebelo; Oliveira,Ila Maria de Aguiar. Bioassays under laboratory conditions aiming to determine the larvicidal activity of Bacillus sphaericus were carried out on Anopheles darlingi and Culex quinquefasciatus. In order to estimate the toxicity through median lethal concentration (LC50) and the relative potency of the strains to B. sphaericus standard strain 2362, probit analysis was performed utilizing the POLO-PC program. The findings of LC50 pointed out high effectiveness on strains IB15 (0.040 ppm), IB19 and S1116 (0.048 ppm), IB16 (0.052 ppm) and S265 (0.057 ppm). Strain IB15 presented nearly 50% more potency than strain 2362 in bioassays conducted on A. darlingi. It was observed that IB16 and S1116 strains were the most powerful against C. quinquefasciatus, showing to be about 300-400%... Tipo: Info:eu-repo/semantics/article Palavras-chave: Vector control; Bioassays; Biolarvicides; Amazonian; Entomopathogens. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672008000200008 Chromosomal characterization of Amazonian freshwater stingrays with evidence for new karyomorphs and XX/XY sex chromosomes Genet. Mol. Biol. Valentim,Francisco Carlos de Souza; Porto,Jorge Ivan Rebelo; Feldberg,Eliana. Abstract Cytogenetic studies in the subfamily Potamotrygoninae have provided valuable insights into the understanding of the evolution and diversification of its species. In the present study, the chromosomal features of seven nominal potamotrygonin species are provided: Plesiotrygon iwamae (2n=74, FN=120), Potamotrygon amazona (2n=66, FN=107), P. constellata (2n=66, FN=110), P. leopoldi (2n=64, FN=102), P. motoro (2n=66, FN=106) from four different localities, and P. orbignyi (2n=66, FN=106), P. scobina (2n=66, FN=104), from Central Amazon. Additionally, we found a new karyomorph in P. wallacei. We considered the localization of Nucleolus Organizer Regions (NORs), as well as the pattern of constitutive heterochromatin, as species-specific characters. We... Tipo: Info:eu-repo/semantics/article Palavras-chave: Elasmobranchs; Cytogenetics; Chromosomal rearrangements; Sex chromosomes; Karyotypic diversity. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000400578 Comparative cytogenetics of Carnegiella marthae and Carnegiella strigata (Characiformes, Gasteropelecidae) and description of a ZZ/ZW sex chromosome system Genet. Mol. Biol. Terencio,Maria Leandra; Schneider,Carlos Henrique; Gross,Maria Claudia; Silva,Adailton Moreira da; Feldberg,Eliana; Porto,Jorge Ivan Rebelo. Comparative cytogenetic analyses of hatchetfishes Carnegiella marthae and Carnegiella strigata (Gasteropelecidae) from the Rio Negro basin were performed using conventional Giemsa staining, silver (Ag) -staining and C-banding. The diploid chromosome numbers of both species equaled 2n = 50 but their karyotypes were distinct. We found evidence for sex chromosomes in C. marthae since karyotype of males presented 20 M + 12 SM + 4 ST + 14 A and ZZ ST chromosomes while the females presented 20 M + 12 SM + 4 ST + 14 A and ZW ST chromosomes of distinct size. Conversely, C. strigata presented 4 M + 4 SM + 2 ST + 40 A chromosomes without sex chromosome heteromorphism. Karyotypes of both species had two NOR-bearing SM chromosomes of distinct size indicating the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish cytogenetics; Karyotype differentiation; NOR phenotypes; Heteromorphic sex chromosome system; Cytotaxonomy. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200011 Cytogenetic studies of two freshwater sciaenids of the genus Plagioscion (Perciformes, Sciaenidae) from the central Amazon Genet. Mol. Biol. Feldberg,Eliana; Porto,Jorge Ivan Rebelo; Santos,Elen Bethlen Pedraça dos; Valentim,Francisco Carlos Souza. Cytogenetic characterization of two freshwater sciaenid species from the genus Plagioscion (P. squamosissimus and Plagioscion sp.) was obtained for the first time. Giemsa staining, Ag-NOR and C-banding revealed that both species presented 2n = 48 chromosomes (almost all acrocentric). Single NORs and heterochromatin were found mainly at the pericentromeric position. Karyotypic formulae and NOR location proved to be valuable in showing both interspecific and intraspecific differences. All chromosomes were acrocentric in P. squamosissimus. NORs were located at proximal positions on the long arms of the last chromosome pair of the complement, and were heteromorphic due to size differences. Such heteromorphic NORs seem to be associated with each population... Tipo: Info:eu-repo/semantics/article Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000300011 Cytotaxonomy and karyoevolution of the genus Crenicichla (Perciformes, Cichlidae) Genet. Mol. Biol. Benzaquem,Denise Corrêa; Feldberg,Eliana; Porto,Jorge Ivan Rebelo; Gross,Maria Claudia; Zuanon,Jansen Alfredo Sampaio. Karyotypes of six cichlid species of the genus Crenicichla were investigated. The species C. cincta, C. inpa, C. reticulata, C. lugubris, and C. cf. johanna were collected from Amazon basin, and C. britskii was collected from the Paraná-Paraguai basin. All of the analysed species showed 2n = 48 chromosomes; however, C. cincta, C. lugubris, C. cf. johanna, and C. britskii had a karyotype formula of 8M-SM+40ST-A, FN = 56, while C. inpa and C. reticulata exhibited the formula 6M-SM+42ST-A, FN = 54. Analysis of active Ag-NORs revealed two NOR-bearing chromosomes in all species; however, theses cistrons were located on different chromosome pairs and/or in different chromosome locations in each species. This condition bears evolutionary significance, since it is... Tipo: Info:eu-repo/semantics/article Palavras-chave: Karyotype; Pike cichlid; Chromosome marker; Amazon. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200016 Esterase-D and chromosome patterns in Central Amazon piranha (Serrasalmus rhombeus Linnaeus, 1766) from Lake Catalão Genet. Mol. Biol. Teixeira,Aylton Saturnino; Nakayama,Celeste Mutuko; Porto,Jorge Ivan Rebelo; Feldberg,Eliana. This study presents additional genetic data on piranha (Serrasalmus rhombeus Linnaeus, 1766) complex previously diagnosed due to the presence of distinct cytotypes 2n = 58 and 2n = 60. Three esterase-D enzyme loci (Est-D1, Est-D2 and Est-D3) were examined and complemented with chromosomal data from 66 piranha specimens collected from Lake Catalão. For all specimens the Est-D1 and Est-D2 loci were monomorphic. In contrast, the Est-D3 locus was polymorphic with genotypes and alleles being differentially distributed in the previously described cytotypes and served as the basis for detecting a new cytotype (2n = 60 B). In cytotype 2n = 58 the Est-D3 locus was also polymorphic and presented Mendelian allelic segregation with four genotypes (Est-D3(11),... Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazilian Amazon basin; Esterase enzymes; Serrasalmus rhombeus species complex; Karyotype. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000300018 Insertion sequences as variability generators in the Mycoplasma hyopneumoniae and M. synoviae genomes Genet. Mol. Biol. Loreto,Elgion Lúcio Silva; Ortiz,Mauro Freitas; Porto,Jorge Ivan Rebelo. We have analyzed the sequenced genomes of three strains of Mycoplasma hyopneumoniae and one strain of M. synoviae, and have found three and two different transposable element families, respectively in each species. In M. hyopneumoniae, the Insertion Sequences of the IS4 family is represented by ISMHp1, a putatively active element. The IS3 family is represented by several degenerated sequences. A third element called tMH was found, which shows some characteristics reminiscent of retrotransposons. In M. synoviae, three different possibly active IS4 elements are present (ISMHp1-like; ISMs1 and IS1634-like elements). The IS30 family is represented by the degenerated IS1630-like element. The IS1634-like element is shown to be involved in chromosomal... Tipo: Info:eu-repo/semantics/article Palavras-chave: Insertion sequences; IS; Mollicutes; Horizontal gene transfer; Mycoplasma. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000200017 Registros recuperados: 7 Primeira ... 1 ... Última

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