Viviani Sene | São Paulo State University (original) (raw)
Papers by Viviani Sene
Genética na Escola
O jogo da memória é muito antigo e acredita-se que era praticado pelos povos do Antigo Egito. Out... more O jogo da memória é muito antigo e acredita-se que era praticado pelos povos do Antigo Egito. Outros atribuem sua origem à China. Porém, indiscutivelmente, este tipo de jogo é excelente para ser usado como técnica para exercitar raciocínio e memorização. O jogo “Memória Genética” é formado por um baralho de 60 cartas, com 30 figuras associadas a conceitos, funções ou curiosidades a respeito de temas como divisão celular, estrutura e organização dos cromossomos.
Chromosome Research, 2015
20th International Chromosome Conference (ICCXX) 50th Anniversary, University of Kent, Canterbury... more 20th International Chromosome Conference (ICCXX) 50th Anniversary, University of Kent, Canterbury, 1st–4th September 2014
First description of the karyotype and localization of
Journal of Fish Biology, 2016
Cytogenetic and molecular analyses enabled identification of two cytotypes among individuals of t... more Cytogenetic and molecular analyses enabled identification of two cytotypes among individuals of the spotted scorpion fish Scorpaena plumieri from Margarita Island, Venezuela. Cytotype 1 was characterized by 48 subtelo-acrocentric chromosomes and fundamental number (number of chromosome arms; FN) equalled 48, while cytotype 2 was characterized by two metacentric and 46 subtelo-acrocentric chromosomes and FN was 50. These cytotypes also differed in the location of the ribosomal gene clusters and in the distribution of the constitutive heterochromatin. Moreover, fish from the cytotypes 1 and 2 were found to belong to distinct mitochondrial lineages. The presence of two S. plumieri cytotypes from two lineages separated by high genetic distance suggests that they correspond to sympatric cryptic species.
Cytogenetic and Genome Research, 2015
Access to full text and tables of contents, including tentative ones for forthcoming issues: www.... more Access to full text and tables of contents, including tentative ones for forthcoming issues: www.karger.com/cgr_issues Case Reports
... pela amizade. Aos professores Dr. Artur Antônio Andreata e Dr. Cláudio de Oliveira, pelo ... ... more ... pela amizade. Aos professores Dr. Artur Antônio Andreata e Dr. Cláudio de Oliveira, pelo ... cada pessoa é única e nenhuma substitui a outra... Charles Chaplin. Aos amigos de Botucatu Amanda, Priscilla, Ricardo, Aline, Érica, Elkin, Maria ...
Comparative Cytogenetics, 2014
Comparative Cytogenetics, 2017
Recent molecular phylogenetic analyses have shown that the Mugil curema Valenciennes, 1836 specie... more Recent molecular phylogenetic analyses have shown that the Mugil curema Valenciennes, 1836 species complex includes M. incilis Hancock, 1830, M. thoburni (Jordan & Starks, 1896) and at least four "M. curema" mitochondrial lineages, considered as cryptic species. The cytogenetic data on some representatives of the species complex have shown a high cytogenetic diversity. This research reports the results of cytogenetic and molecular analyses of white mullet collected in Ecuador. The analyzed specimens were molecularly assigned to the Mugil sp. O, the putative cryptic species present in the Pacific Ocean and showed a 2n = 46 karyotype, which is composed of 2 metacentric and 44 subtelocentric/acrocentric chromosomes. This karyotype is different from the one described for M. incilis (2n = 48) and from those of the two western Atlantic lineages Mugil curema (2n = 28), and Mugil margaritae (2n = 24). Data suggest the need for a morphological analysis to assign a species name to this Pacific lineage.
Comparative Cytogenetics, Apr 7, 2017
Recent molecular phylogenetic analyses have shown that the Mugil curema Valenciennes, 1836 specie... more Recent molecular phylogenetic analyses have shown that the Mugil curema Valenciennes, 1836 species complex includes M. incilis Hancock, 1830, M. thoburni (Jordan & Starks, 1896) and at least four "M. curema" mitochondrial lineages, considered as cryptic species. The cytogenetic data on some representatives of the species complex have shown a high cytogenetic diversity. This research reports the results of cytogenetic and molecular analyses of white mullet collected in Ecuador. The analyzed specimens were molecularly assigned to the Mugil sp. O, the putative cryptic species present in the Pacific Ocean and showed a 2n = 46 karyotype, which is composed of 2 metacentric and 44 subtelocentric/acrocentric chromosomes. This karyotype is different from the one described for M. incilis (2n = 48) and from those of the two western Atlantic lineages Mugil curema (2n = 28), and Mugil margaritae (2n = 24). Data suggest the need for a morphological analysis to assign a species name to this Pacific lineage.
Cytogenetic and genome research, Jan 12, 2015
Transposable elements constitute a remarkable fraction of the eukaryote genome and show particula... more Transposable elements constitute a remarkable fraction of the eukaryote genome and show particular capacity to move and insert in specific regions of the genome. This study identified the retrotransposable elements Rex1 and Rex3 in the genomes of 6 cytotypes of Eigenmannia. The sequences were isolated by PCR, sequenced and physically mapped in the chromosomes of these cytotypes, aiming to investigate the organization and distribution of these elements in this fish group, mainly in the sex chromosomes. The FISH physical mapping revealed that both Rex1 and Rex3 elements are dispersed in small clusters throughout the chromosomes of all cytotypes analyzed. However, conspicuous blocks occur in several samples, including an accentuated accumulation of the Rex3 element in X1 and X2 chromosomes of Eigenmannia sp. 2 and in the X chromosome of E. virescens. The accumulations are coincident with heterochromatin-rich regions, suggesting that Rex3 played a role in the differentiation process of ...
Comparative Cytogenetics, 2015
Karyotypic features of Rhoadsiaaltipinna Fowler, 1911 from Ecuador were investigated by examining... more Karyotypic features of Rhoadsiaaltipinna Fowler, 1911 from Ecuador were investigated by examining metaphase chromosomes through Giemsa staining, C-banding, Ag-NOR, and two-color-fluorescence in situ hybridization (FISH) for mapping of 18S and 5S ribosomal genes. The species exhibit a karyotype with 2n = 50, composed of 10 metacentric, 26 submetacentric and 14 subtelocentric elements, with a fundamental number FN=86 and is characterized by the presence of a larger metacentric pair (number 1), which is about 2/3 longer than the average length of the rest of the metacentric series. Sex chromosomes were not observed. Heterochromatin is identifiable on 44 chromosomes, distributed in paracentromeric position near the centromere. The first metacentric pair presents two well-defined heterochromatic blocks in paracentromeric position, near the centromere. Impregnation with silver nitrate showed a single pair of Ag-positive NORs localized at terminal regions of the short arms of the subtelocentric chromosome pair number 12. FISH assay confirmed these localization of NORs and revealed that minor rDNA clusters occur interstitially on the larger metacentric pair number 1. Comparison of results here reported with those available on other Characidae permit to hypothesize that the presence of a very large metacentric pair might represent a unique and derived condition that characterize one of four major lineages molecularly identified in this family.
Comparative Cytogenetics, 2014
Genética na Escola
O jogo da memória é muito antigo e acredita-se que era praticado pelos povos do Antigo Egito. Out... more O jogo da memória é muito antigo e acredita-se que era praticado pelos povos do Antigo Egito. Outros atribuem sua origem à China. Porém, indiscutivelmente, este tipo de jogo é excelente para ser usado como técnica para exercitar raciocínio e memorização. O jogo “Memória Genética” é formado por um baralho de 60 cartas, com 30 figuras associadas a conceitos, funções ou curiosidades a respeito de temas como divisão celular, estrutura e organização dos cromossomos.
Chromosome Research, 2015
20th International Chromosome Conference (ICCXX) 50th Anniversary, University of Kent, Canterbury... more 20th International Chromosome Conference (ICCXX) 50th Anniversary, University of Kent, Canterbury, 1st–4th September 2014
First description of the karyotype and localization of
Journal of Fish Biology, 2016
Cytogenetic and molecular analyses enabled identification of two cytotypes among individuals of t... more Cytogenetic and molecular analyses enabled identification of two cytotypes among individuals of the spotted scorpion fish Scorpaena plumieri from Margarita Island, Venezuela. Cytotype 1 was characterized by 48 subtelo-acrocentric chromosomes and fundamental number (number of chromosome arms; FN) equalled 48, while cytotype 2 was characterized by two metacentric and 46 subtelo-acrocentric chromosomes and FN was 50. These cytotypes also differed in the location of the ribosomal gene clusters and in the distribution of the constitutive heterochromatin. Moreover, fish from the cytotypes 1 and 2 were found to belong to distinct mitochondrial lineages. The presence of two S. plumieri cytotypes from two lineages separated by high genetic distance suggests that they correspond to sympatric cryptic species.
Cytogenetic and Genome Research, 2015
Access to full text and tables of contents, including tentative ones for forthcoming issues: www.... more Access to full text and tables of contents, including tentative ones for forthcoming issues: www.karger.com/cgr_issues Case Reports
... pela amizade. Aos professores Dr. Artur Antônio Andreata e Dr. Cláudio de Oliveira, pelo ... ... more ... pela amizade. Aos professores Dr. Artur Antônio Andreata e Dr. Cláudio de Oliveira, pelo ... cada pessoa é única e nenhuma substitui a outra... Charles Chaplin. Aos amigos de Botucatu Amanda, Priscilla, Ricardo, Aline, Érica, Elkin, Maria ...
Comparative Cytogenetics, 2014
Comparative Cytogenetics, 2017
Recent molecular phylogenetic analyses have shown that the Mugil curema Valenciennes, 1836 specie... more Recent molecular phylogenetic analyses have shown that the Mugil curema Valenciennes, 1836 species complex includes M. incilis Hancock, 1830, M. thoburni (Jordan & Starks, 1896) and at least four "M. curema" mitochondrial lineages, considered as cryptic species. The cytogenetic data on some representatives of the species complex have shown a high cytogenetic diversity. This research reports the results of cytogenetic and molecular analyses of white mullet collected in Ecuador. The analyzed specimens were molecularly assigned to the Mugil sp. O, the putative cryptic species present in the Pacific Ocean and showed a 2n = 46 karyotype, which is composed of 2 metacentric and 44 subtelocentric/acrocentric chromosomes. This karyotype is different from the one described for M. incilis (2n = 48) and from those of the two western Atlantic lineages Mugil curema (2n = 28), and Mugil margaritae (2n = 24). Data suggest the need for a morphological analysis to assign a species name to this Pacific lineage.
Comparative Cytogenetics, Apr 7, 2017
Recent molecular phylogenetic analyses have shown that the Mugil curema Valenciennes, 1836 specie... more Recent molecular phylogenetic analyses have shown that the Mugil curema Valenciennes, 1836 species complex includes M. incilis Hancock, 1830, M. thoburni (Jordan & Starks, 1896) and at least four "M. curema" mitochondrial lineages, considered as cryptic species. The cytogenetic data on some representatives of the species complex have shown a high cytogenetic diversity. This research reports the results of cytogenetic and molecular analyses of white mullet collected in Ecuador. The analyzed specimens were molecularly assigned to the Mugil sp. O, the putative cryptic species present in the Pacific Ocean and showed a 2n = 46 karyotype, which is composed of 2 metacentric and 44 subtelocentric/acrocentric chromosomes. This karyotype is different from the one described for M. incilis (2n = 48) and from those of the two western Atlantic lineages Mugil curema (2n = 28), and Mugil margaritae (2n = 24). Data suggest the need for a morphological analysis to assign a species name to this Pacific lineage.
Cytogenetic and genome research, Jan 12, 2015
Transposable elements constitute a remarkable fraction of the eukaryote genome and show particula... more Transposable elements constitute a remarkable fraction of the eukaryote genome and show particular capacity to move and insert in specific regions of the genome. This study identified the retrotransposable elements Rex1 and Rex3 in the genomes of 6 cytotypes of Eigenmannia. The sequences were isolated by PCR, sequenced and physically mapped in the chromosomes of these cytotypes, aiming to investigate the organization and distribution of these elements in this fish group, mainly in the sex chromosomes. The FISH physical mapping revealed that both Rex1 and Rex3 elements are dispersed in small clusters throughout the chromosomes of all cytotypes analyzed. However, conspicuous blocks occur in several samples, including an accentuated accumulation of the Rex3 element in X1 and X2 chromosomes of Eigenmannia sp. 2 and in the X chromosome of E. virescens. The accumulations are coincident with heterochromatin-rich regions, suggesting that Rex3 played a role in the differentiation process of ...
Comparative Cytogenetics, 2015
Karyotypic features of Rhoadsiaaltipinna Fowler, 1911 from Ecuador were investigated by examining... more Karyotypic features of Rhoadsiaaltipinna Fowler, 1911 from Ecuador were investigated by examining metaphase chromosomes through Giemsa staining, C-banding, Ag-NOR, and two-color-fluorescence in situ hybridization (FISH) for mapping of 18S and 5S ribosomal genes. The species exhibit a karyotype with 2n = 50, composed of 10 metacentric, 26 submetacentric and 14 subtelocentric elements, with a fundamental number FN=86 and is characterized by the presence of a larger metacentric pair (number 1), which is about 2/3 longer than the average length of the rest of the metacentric series. Sex chromosomes were not observed. Heterochromatin is identifiable on 44 chromosomes, distributed in paracentromeric position near the centromere. The first metacentric pair presents two well-defined heterochromatic blocks in paracentromeric position, near the centromere. Impregnation with silver nitrate showed a single pair of Ag-positive NORs localized at terminal regions of the short arms of the subtelocentric chromosome pair number 12. FISH assay confirmed these localization of NORs and revealed that minor rDNA clusters occur interstitially on the larger metacentric pair number 1. Comparison of results here reported with those available on other Characidae permit to hypothesize that the presence of a very large metacentric pair might represent a unique and derived condition that characterize one of four major lineages molecularly identified in this family.
Comparative Cytogenetics, 2014