13 results on '"Scacchetti, Priscilla Cardim"'
Search Results
2. Mapping five repetitive DNA classes in sympatric species of Hypostomus (Teleostei: Siluriformes: Loricariidae): analysis of chromosomal variability
- Author
-
Pansonato-Alves, José Carlos, Serrano, Érica Alves, Utsunomia, Ricardo, Scacchetti, Priscilla Cardim, Oliveira, Claudio, and Foresti, Fausto
- Published
- 2013
- Full Text
- View/download PDF
3. Particular Chromosomal Distribution of Microsatellites in Five Species of the Genus Gymnotus (Teleostei, Gymnotiformes)
- Author
-
Utsunomia, Ricardo, primary, Melo, Silvana, additional, Scacchetti, Priscilla Cardim, additional, Oliveira, Claudio, additional, Machado, Milla de Andrade, additional, Pieczarka, Julio Cesar, additional, Nagamachi, Cleusa Yoshiko, additional, and Foresti, Fausto, additional
- Published
- 2018
- Full Text
- View/download PDF
4. The non-monotypic status of the neotropical fish genus Hemiodontichthys (Siluriformes, Loricariidae) evidenced by genetic approaches
- Author
-
Carvalho, Margarida Lima, primary, Costa Silva, Guilherme José da, additional, Melo, Silvana, additional, Ashikaga, Fernando Yuldi, additional, Shimabukuro-Dias, Cristiane Kioko, additional, Scacchetti, Priscilla Cardim, additional, Devidé, Renato, additional, Foresti, Fausto, additional, and Oliveira, Claudio, additional
- Published
- 2018
- Full Text
- View/download PDF
5. Esttrutura cromossômica e caracterização cariotípica no gênero Characidium (Teleostei, Characiformes, Crenuchidae)
- Author
-
Scacchetti, Priscilla Cardim [UNESP], Universidade Estadual Paulista (Unesp), Foresti, Fauto [UNESP], and Alves, José Carlos Pansonato [UNESP]
- Subjects
Peixe - Pesquisa ,Análise de DNA ,Fishes ,Citogenetica ,Sex chromosomes ,Cromossomos sexuais ,Peixe - Genética - Abstract
Made available in DSpace on 2016-06-07T17:12:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-02-27. Added 1 bitstream(s) on 2016-06-07T17:16:47Z : No. of bitstreams: 1 000864281.pdf: 2841286 bytes, checksum: e1b59c63f77c2d49bd85b14c3d63dde2 (MD5) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) No presente estudo, foram analisadas dezoito espécies de peixes do gênero Characidium, C. cf. zebra, C. tenue, C. xavante, C. stigmosum, Characidium sp1, Characidium sp2, Characidium sp3, Characidium sp4, Characidium sp5, Characidium sp6, C. pterostictum, C. vestigipinne, C. rachovii, C. orientale, C. serrano, C. timbuiense, C. vidali e Characidium sp. aff. C. vidali de diferentes bacias hidrográficas brasileiras, com o uso de técnicas citogenéticas básicas (coloração com Giemsa e bandamento C) e moleculares (hibridação in situ fluorescente com sondas de DNAr 18S e 5S, DNA telomérico (TTAGGG)n e 4 sequências de microssatélites ((CA)15, (GA)15, (CG)15 e (TTA)10), e pintura cromossômica através da microdissecção e amplificação do cromossomo sexual W de C. gomesi (sonda chamada de CgW). Além disso, foi realizado o sequenciamento de DNA associado a sítios de restrição pela enzima SbfI (RAD-tags) através do sistema Illumina Genome Analyzer em machos e fêmeas de C. gomesi. Todas as espécies apresentaram número diploide de 2n=50 cromossomos, com predominância dos cromossomos dos tipos meta e submetacêntricos, além da ocorrência de cromossomos supranumerários em Characidium sp. aff. C. vidali e um par cromossômico acrocêntrico exclusivo detectado em C. pterostictum, C. serrano e C. timbuiense. Foi observada também a ocorrência de um sistema ZZ/ZW de cromossomos sexuais em distintos estágios de diferenciação em todas as espécies, com exceção de Characidium cf. zebra, C. tenue, C. xavante e C. stigmosum. A análise da heterocromatina constitutiva por bandamento C revelou a presença de heterocromatina nos cromossomos sexuais, principalmente no cromossomo W e em blocos intersticiais e/ou teloméricos nos braços longos do cromossomo Z e nos cromossomos Bs de Characidium sp. aff. C. vidali. Sequências de DNAr 5S foram localizadas em diferentes cromossomos, com variação na quantidade de sítios entre as espécies,... In the present study, eighteen species from the genus Characidium collected at different river basins were analyzed, including C. cf. zebra, C. tenue, C. xavante, C. stigmosum, Characidium sp1, Characidium sp2, Characidium sp3, Characidium sp4, Characidium sp5, Characidium sp6, C. pterostictum, C. vestigipinne, C. rachovii, C. orientale, C. serrano, C. timbuiense, C. vidali e Characidium sp. aff. C. vidali. The analyses involved classical (Giemsa conventional staining and C-banding) and molecular cytogenetic techniques (fluorescent in situ hybridization with ribosomal 5S and 18S, telomeric, microsatellite motifs and U2 snDNA probes, whole chromosome painting using W-specific probe obtained from C. gomesi-CgW). Besides that, DNA sequencing of restriction-associated DNA (RAD) was carried out in males and females of C. gomesi. All species showed diploid chromosome numbers of 2n=50, with karyotypes mainly composed of meta- and submetacentric types, besides the occurrence of supernumerary chromosomes in Characidium sp. aff. C. vidali and one acrocentric pair in C. pterostictum, C. serrano e C. timbuiense. Also, almost all the analyzed species showed a ZZ/ZW sex chromosome system in distinct evolutionary stages, except Characidium cf. zebra, C. tenue, C. xavante e C. stigmosum. The constitutive heterochromatin was located differentially on the W chromosomes and in interstitial and telomeric position on the Z chromosomes, as well as in the B chromosomes of Characidium sp. aff. C. vidali. 5S rDNA was differentially distributed in the different species, with variations on the number of clusters per genome and position in the karyotype, while the 18S rDNA was conserved in number of sites per genome and variable in location. Conversely, the U2 snDNA distribution was conserved in a single homologous chromosome pair in all species, except in Characidium sp. aff. C. vidali and Characidium sp2. Telomeric probes revealed species with several interstitial... FAPESP: 10/19971-8
- Published
- 2015
6. Uncovering the Ancestry of B Chromosomes in Moenkhausia sanctaefilomenae (Teleostei, Characidae)
- Author
-
Utsunomia, Ricardo, primary, Silva, Duílio Mazzoni Zerbinato de Andrade, additional, Ruiz-Ruano, Francisco J., additional, Araya-Jaime, Cristian, additional, Pansonato-Alves, José Carlos, additional, Scacchetti, Priscilla Cardim, additional, Hashimoto, Diogo Teruo, additional, Oliveira, Claudio, additional, Trifonov, Vladmir A., additional, Porto-Foresti, Fábio, additional, Camacho, Juan Pedro M., additional, and Foresti, Fausto, additional
- Published
- 2016
- Full Text
- View/download PDF
7. Mapeamento físico de genes ribosomais 18S e 5S nos cromossomos de espécies simpáticas do gênero Gymnotus (Teleostei, Gymnotiformes, Gymnotidae)
- Author
-
Scacchetti, Priscilla Cardim [UNESP], Universidade Estadual Paulista (Unesp), Foresti, Fausto [UNESP], and Alves, José Carlos Pansonato [UNESP]
- Subjects
Cromossomos ,Peixe - Genetica ,Animal Cytogenetics ,Citogenética animal - Abstract
Made available in DSpace on 2014-06-11T19:30:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-02-25Bitstream added on 2014-06-13T20:20:30Z : No. of bitstreams: 1 scacchetti_pc_me_botib.pdf: 611456 bytes, checksum: 9da86fc13407eb38ca4617dc47ac3e9d (MD5) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Foram analisadas citogeneticamente quatro espécies de peixes do gênero Gymnotus, G. sylvius, G. pantherinus, G. inaequilabiatus e G. cf. carapo de componentes de diferentes bacias hidrográficas brasileiras, com o uso de técnicas citogenéticas básicas (coloração com Giemsa, localização das RONs pela marcação com nitrato de Prata e bandamento C) e citomoleculares (coloração com os fluorocromos base-específicos CMA3 e DAPI, hibridação in fluorescente situ (FISH) com sondas de DNAr 18S e 5S, sonda teloméricas (TTAGGG)n e sonda obtida do cromossomo portador das RONs de G. carapo da bacia Amazônica por Fluorescence Activated Cell Sorting (FACS) e caracterização e organização genômica do DNAr 5S). G. sylvius apresentou número diplóide de 40 cromossomos (22m+12sm+6st); G. pantherinus apresentou número diplóide de 52 cromossomos (32m+18sm+2st) e G. inaequilabiatus (42m+10sm+2a) e G. cf. carapo (38m+12sm+4st) apresentaram 54 cromossomos. O bandamento C evidenciou a marcação de pequenos blocos centroméricos em todos os cromossomos de todas as espécies, sendo, porém, detectadas algumas marcações intersticiais em G. sylvius e grandes blocos intersticiais nos cromossomos de G. inaequilabiatus, G. cf. carapo e G. pantherinus. As RONs foram identificadas em apenas um par cromossômico nas quatro espécies e foram coincidentes com a hibridação fluorescente in situ realizada com a sonda para DNAr 18S e a coloração com o fluorocromo CMA3. A hibridação com a sonda para DNAr 5S revelou marcações em até dezessete pares de cromossomos em G. inaequilabiatus e em até quinze pares em G. cf. carapo; dois pares cromossômicos em G. pantherinus e um par em G. sylvius. A hibridação com a sonda para a sequência telomérica (TTAGGG)n revelou marcações nos telômeros de todos os cromossomos dos representantes destas quatro espécies, além de blocos intersticiais no primeiro... Four fish species of the genus Gymnotus comprised by G. sylvius, G. pantherinus, G. inaequilabiatus and G. cf. carapo from different Brazilian hydrographic basins were analyzed using classic cytogenetic (coloration with Giemsa, localization of NORs for silver nitrate marking and C-banding) and molecular cytogenetic techniques with base-specific fluorochrome DAPI and CMA3, fluorescence in situ hybridization (FISH) with probes consisting of 18S and 5S rDNA, telomeric sequences (TTAGGG)n and whole chromosome prepared by Fluorescence Activated Cell Sorting (FACS) of the NOR chromosome, obtained of G. carapo from Amazon basin, as well as a characterization and genomic organization of 5S rDNA. G. sylvius presented a diploid number of 40 chromosomes (22m+12sm+6st); G. pantherinus presented a karyotype with 52 chromosomes (32m+18sm+2st) and G. inaequilabiatus (42m+10sm+2a) and G. cf. carapo (38m+12sm+4st) presented 54 chromosomes. All the species presented the constitutive heterochromatin located in the centromeric region of all chromosomes. Besides that, some interstitial marks were detected in G. sylvius and large interstitial blocks were identified at the chromosomes of G. inaequilabiatus, G. cf. carapo and G. pantherinus. NORs were identified in only one chromosome pair in all species and were coincident with the in situ hybridization using probes of 18S rDNA and the fluorochrome CMA3. FISH using the probes of 5S rDNA revealed marks up to seventeen chromosome pairs in G. inaequilabiatus and up to fifteen pairs in G. cf. carapo, two chromosome pairs in G. pantherinus and one pair in G. sylvius. The telomeric probes were localized at the telomeres of all chromosomes in the four species, as well as interstitial telomeric sequence in the first metacentric pair in G. sylvius and along the NORs in G. inaequilabiatus and G. cf. carapo. The amplification, cloning, sequencing and in situ hybridization... (Complete abstract click electronic access below)
- Published
- 2011
8. Repetitive DNA Sequences and Evolution of ZZ/ZW Sex Chromosomes in Characidium (Teleostei: Characiformes)
- Author
-
Scacchetti, Priscilla Cardim, primary, Utsunomia, Ricardo, additional, Pansonato-Alves, José Carlos, additional, da Costa Silva, Guilherme José, additional, Vicari, Marcelo Ricardo, additional, Artoni, Roberto Ferreira, additional, Oliveira, Claudio, additional, and Foresti, Fausto, additional
- Published
- 2015
- Full Text
- View/download PDF
9. Extensive spreading of interstitial telomeric sites on the chromosomes of Characidium (Teleostei, Characiformes)
- Author
-
Scacchetti, Priscilla Cardim, primary, Utsunomia, Ricardo, additional, Pansonato-Alves, José Carlos, additional, da Costa-Silva, Guilherme José, additional, Oliveira, Claudio, additional, and Foresti, Fausto, additional
- Published
- 2014
- Full Text
- View/download PDF
10. Particular Chromosomal Distribution of Microsatellites in Five Species of the Genus Gymnotus(Teleostei, Gymnotiformes)
- Author
-
Utsunomia, Ricardo, Melo, Silvana, Scacchetti, Priscilla Cardim, Oliveira, Claudio, Machado, Milla de Andrade, Pieczarka, Julio Cesar, Nagamachi, Cleusa Yoshiko, and Foresti, Fausto
- Abstract
AbstractMicrosatellites show great abundance in eukaryotic genomes, although distinct chromosomal distribution patterns might be observed, from small dispersed signals to strong clustered motifs. In Neotropical fishes, the chromosome mapping of distinct microsatellites was employed several times to uncover the origin and evolution of sex and supernumerary chromosomes, whereas a detailed comparative analysis considering different motifs at the chromosomal level is scarce. Here, we report the chromosomal location of several simple sequence repeats (SSRs) in distinct electric knife fishes showing variable diploid chromosome numbers to unveil the structural organization of several microsatellite motifs in distinct Gymnotusspecies. Our results showed that some SSRs are scattered throughout the genomes, whereas others are particularly clustered displaying intense genomic compartmentalization. Interestingly, the motifs CA, GA, and GAG exhibited a band-like pattern of hybridization, useful for the identification of homologous chromosomes. Finally, the colocalization of SSRs with multigene families is probably related to the association of microsatellites with gene spacers in this case.
- Published
- 2018
- Full Text
- View/download PDF
11. Scattered organization of the histone multigene family and transposable elements in Synbranchus
- Author
-
Utsunomia, Ricardo, primary, Pansonato-Alves, José Carlos, additional, Scacchetti, Priscilla Cardim, additional, Oliveira, Claudio, additional, and Foresti, Fausto, additional
- Published
- 2014
- Full Text
- View/download PDF
12. Mapping five repetitive DNA classes in sympatric species of Hypostomus (Teleostei: Siluriformes: Loricariidae): analysis of chromosomal variability.
- Author
-
Pansonato-Alves, José Carlos, Serrano, Érica Alves, Utsunomia, Ricardo, Scacchetti, Priscilla Cardim, Oliveira, Claudio, and Foresti, Fausto
- Subjects
DNA analysis ,GENE mapping ,SYMPATRIC speciation ,HYPOSTOMUS ,CHROMOSOME analysis ,HETEROCHROMATIN - Abstract
Fish belonging to the genus Hypostomus are known for exhibiting a striking diversity in its karyotype structure, however the knowledge concerning the distribution patterns of heterochromatin and location of repetitive DNA sequences in the karyotypes is still limited. Aiming a better understanding of the chromosomal organization in this group, we analyzed three sympatric species of Hypostomus collected in the Hortelã stream, a component of the Paranapanema River basin, Botucatu/SP/Brazil. The analyses involved the cytogenetic characterization and chromosomal mapping of repetitive sequences and intra/interspecific comparisons using sequences of the cytochrome C oxidase subunit I. The results revealed that H. ancistroides presents a karyotype with 2n = 68 chromosomes, H. strigaticeps 2n = 72 chromosomes, and H. nigromaculatus 2n = 76 chromosomes. In addition to differences found in the diploid number, it was also observed variations in karyotypic formulae, amount of constitutive heterochromatin, and location of nucleolus organizer regions. The cytogenetic mapping of 5S and 18S rDNA, as well as of the H3 histone gene, disclosed a differential dispersion process among the three species. In some cases the Rex1 transposable element showed to be co-located with 5S rDNA sites. The molecular analyses support the cytogenetic data and represent an additional tool for the characterization of the analyzed species. The results evidenced that chromosomal variations are not restricted to differences in diploid number or karyotypic macrostructure in the genus Hypostomus, indicating that events such as transposition of heterochromatin and rDNA segments may participate in the differentiation process occurred in these species. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
13. Karyotypic diversity in four species of the genus Gymnotus Linnaeus, 1758 (Teleostei, Gymnotiformes, Gymnotidae): physical mapping of ribosomal genes and telomeric sequences.
- Author
-
Scacchetti, Priscilla Cardim, Pansonato-Alves, José Carlos, Utsunomia, Ricardo, Oliveira, Claudio, and Foresti, Fausto
- Subjects
- *
RECOMBINANT DNA , *CYTOGENETICS , *HETEROCHROMATIN , *FISH populations ,FISH speciation - Abstract
Conventional (Giemsa, C-Banding, Ag-NORs, CMA3) and molecular (5S rDNA, 18S rDNA, telomeric sequences) cytogenetic studies were carried out in specimens of ten distinct fish populations of the genus Gymnotus (G. sylvius Albert and Fernandes-Matioli, 1999, G. inaequilabiatus Valenciennes, 1839, G. pantherinus Steindachner, 1908, and G. cf. carapo Linnaeus, 1758) from different Brazilian hydrographic basins. G. sylvius presented a diploid number of 40 chromosomes (22m+12sm+6st), G. pantherinus presented 52 chromosomes (32m+18sm+2st), while G. inaequilabiatus (42m+10sm+2a) and G. cf. carapo (38m+12sm+4st) presented 54 chromosomes. The C-banding technique revealed centromeric marks in all chromosomes of all species. Besides that, conspicuous blocks of heterochromatin were found interstitially on the chromosomes of G. inaequilabiatus, G. cf. carapo, and G. pantherinus. All four species showed single nucleolus organizing regions confirmed by results obtained through Ag-NORs and FISH experiments using 18S rDNA probes, which showed the NORs localized on the first chromosome pair in G. inaequilabiatus, G. cf. carapo, and G. pantherinus, and on pair 2 in G. sylvius. CMA3 staining revealed additional unrelated NORs marks in G. sylvius and G. pantherinus. The 5S rDNA probes revealed signals on one pair in G. sylvius and two pairs in G. pantherinus; G. inaequilabiatus had about seventeen pairs marked, and G. cf. carapo had about fifteen pairs marked. It is considered that the high amount of heterochromatin identified in the chromosomes of G. inaequilabiatus and G. cf. carapo could have facilitated the dispersion of 5S rDNA in these species. Interstitial signals were detected on the first metacentric pair of G. sylvius by telomeric probes (TTAGGG)n indicating the possible occurrence of chromosomal fusions in this species. The present study reveals valuable cytotaxonomic markers for this group and allows a more precise evaluation of the processes involved in the karyotype differentiation and the interrelationships among different species of the genus Gymnotus. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.