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| Registros recuperados: 22 | |
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| Ratcov,Vilma; Vilela,Carlos R.; Goñi,Beatriz. |
| Abstract Drosophila butantan sp. nov., a species belonging to the guarani group and closely related to Drosophila nigrifemur from Bolivia, is described based on a female, and some of its offspring, collected at the forest reserve of the Instituto de Biociências da Universidade de São Paulo, Cidade Universitária "Armando de Salles Oliveira", São Paulo City, state of São Paulo, Brazil. Although externally similar, the two apparently forest-dwelling species can be told apart by having distinct oviscapt valves and spermathecal introverts and tips. Accordingly, a proposal is made to also include D. nigrifemur, a previously unassigned species, in the guarani group. The two species seem to be also related to Drosophila alexandrei and Drosophila guaraja as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic forest; Brazil; Female terminalia; Karyotypes; Male terminalia. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262017000300232 |
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| EIRAS,Paola Ribeiro Seabra; BARRETO FILHO,João Bosco; GOLGHER,Romain Rolland; SANTOS,Sandra Regina Quintino dos. |
| Bovine karyotyping has become an important diagnostic tool in animal breeding. In the prenatal period it can diagnose several chromosomal abnormalities such as Robertsonian translocations, testicle feminization syndrome, gonadal dysgenesis and Klinefelters syndrome. An important cell source for karyotype analysis is the amniotic fluid. It has been extensively used in humans but in bovine, however, this is not the case despite its diagnostic value. Since a small percentage of cells is viable, cells and their growth conditions as well as the handling of the material should be optimal to insure a successful analysis. For this, we have compared the growth efficiency for bovine amniocytes in two media, employing cells from 10 to 14 weeks of gestation.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Karyotypes; Cell culture; Amnion; Cattle. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962000000400005 |
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| Tavares,Jaqueline R.; Sousa,Tatiane P. de; Silva,Joaquim M. da; Venere,Paulo C.; Faria,Karina de C.. |
| ABSTRACT There are two species of Neotropical Round-eared bats, Tonatia bidens Spix, 1823 and Tonatia saurophila Koopman & Williams, 1951, which present highly similar morphological characteristics that can lead to errors of identification. Specimens originally identified as T. bidens have recently been reclassified as T. saurophila, and the only karyotype documented previously for these species was 2n = 16, FN = 20. In the present study, specimens of Tonatia collected in the municipality of Barra do Garças, in the Brazilian state of Mato Grosso, were analyzed morphologically, using conventional cytogenetic techniques (C-banding, Ag-NOR, and CMA3), and through sequences of the mitochondrial cytochrome c oxidase subunit I (COI) gene. In the specimens... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chromosomes; COI gene; Karyotypes; Phyllostominae; Taxonomy. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000500371 |
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| Silva,Jéssica Barata da; Suárez,Pablo; Nagamachi,Cleusa Yoshiko; Carter,Timothy Frederick; Pieczarka,Julio Cesar. |
| Plethodontid salamanders of genus Bolitoglossa constitute the largest and most diverse group of salamanders, including around 20% of living caudate species. Recent studies have indicated the occurrence of five recognized species in the Brazilian Amazon Rainforest. We present here the first cytogenetic data of a Brazilian salamander, which may prove to be a useful by contribution to the cytotaxonomy of the genus. Specimens were collected near the "type" locality (Utinga, Belém, PA, Brazil). Chromosomal preparations from duodenal epithelial cells and testes were subjected to Giemsa staining, C-banding and DAPI/CMA3 fluorochrome staining. All specimens showed a karyotype with 13 bi-armed chromosome pairs (2n = 26). Nucleolar Organizer Regions, evidenced by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salamanders; Bolitoglossa; Karyotypes; Brazilian Amazon; Cytogenetics. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000400008 |
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| Geise,Lena; Astúa,Diego. |
| Gracilinanus microtarsus, from the Atlantic Forest and G. agilis, widespread in central Brazil in the Cerrado and in the northeastern Caatinga are two small Neotropical arboreal opossum species not frequently recorded in simpatry. Here we report eight G. agilis specimens from three localities and 17 G. microtarsus, from 10 localities, all in Minas Gerais, Rio de Janeiro and Bahia states. Species proper identification followed diagnostic characters as appearance of dorsum pelage, ocular-mark, ears and tail lengths and size proportion of the posteromedial vacuities in cranium. Chromosomes in metaphases of five specimens were obtained for both species. Our records extend the previous known geographical distribution of G. microtarsus to Chapada Diamantina, in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: South America; Neotropical marsupials; Karyotypes; Habitat use. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000400030 |
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| Diniz,Débora; Bertollo,Luiz A.C.. |
| Chromosomal studies were carried out on a population of the fish Hoplerythrinus unitaeniatus (jeju) from Prata river in the São Francisco river basin, Minas Gerais, Brazil using conventional Giemsa staining, C-banding, silver nitrate nucleolar organizer region (Ag-NOR) staining and fluorescent in situ hybridization (FISH) with 18S and 5S rDNA probes. We found a high degree of inter- and intra-individual variability with the identification of 2n = 50, 2n = 51 and 2n = 52 karyotypes at nearly the same frequency within the population. Intra-individual variation in chromosomal morphology and, consequently, karyotype formulae was also observed, chiefly in the specimens with 2n = 50 and 2n = 52 chromosomes. Ag-NORs and 18S rDNA sites also showed numerical and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Karyotypes; C-banding; Nucleolar organizing regions; Intra- and inter-individual polymorphism. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000300009 |
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| Silva,Carlos Eduardo Faresin e; Eler,Eduardo Schmidt; Silva,Maria Nazareth F. da; Feldberg,Eliana. |
| The aim was to characterize the karyotype of rodents of the genus Proechimys from three localities in the central Brazilian Amazon, in the search for new markers that might shed light on our understanding of the taxonomy and evolutionary history of this taxon. Two karyotypes were found, viz., 2n = 28, FN = 46 in individuals from the NRSP (Cuieiras River) and REMAN (Manaus), and 2n = 46, FN = 50 in individuals from the Balbina Hydroelectric Plant. While individuals with the karyotype with 2n = 28 chromosomes were morphologically associated with Proechimys cuvieri, their karyotype shared similarities with those of the same diploid number in two other regions. Although three karyotypes are described for Proechimys cuvieri, no geographic distribution pattern... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spiny rats; C-banding; Amazon region; Karyotypes; FISH. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000100012 |
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| Pereira,Núbia P.; Ventura,Karen; Silva Júnior,Magno C.; Silva,Daniela de Melo e; Yonenaga-Yassuda,Yatiyo; Pellegrino,Katia C. M.. |
| The karyotypes of 23 specimens belonging to 16 species from nine genera of Brazilian marsupials (family Didelphidae) were studied. The animals were collected in eight localities of Cerrado or Atlantic Forest biomes in the states of Goiás, Tocantins and São Paulo. The karyotypes were analyzed after conventional Giemsa staining and silver staining of the nucleolus organizer regions (Ag-NORs). New karyotypic data were obtained for Gracilinanus microtarsus (2n = 14, FN = 24), Marmosops paulensis (2n = 14, FN = 24) , Micoreus paraguayanus (2n = 14, FN = 20) and Monodelphis rubida (2n = 18, FN = 32) and are discussed in detail. The karyotypes of G. microtarsus , M. paulensis and M. paraguayanus include three large pairs of submetacentrics (pairs 1, 2... |
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Palavras-chave: Marsupials; Karyotypes; Cytogenetics; Didelphidae; NORs. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500014 |
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| Castro,Márcio Siqueira; Recco-Pimentel,Shirlei M.; Rocha,Guaracy Tadeu. |
| The karyotypes of nine species of the family Ramphastidae were determined and compared with that of the toco toucan (Ramphastos toco), the only ramphastid karyotype so far reported in the literature. Differences in the morphology of the largest chromosomes allowed to identify three karyotype groups. The first group included the species R. toco, Baillonius bailloni, Pteroglossus castanotis, P. aracari and Selenidera maculirostris, in which only the first pair of chromosomes was metacentric. The second group included four Ramphastos species (R. dicolorus, R. ariel, R. vitellinus, R. tucanus cuvieri) with two pairs of metacentric macrochromosomes (the first and the seventh). The third group was represented by a single species, A. laminirostris, in which all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Karyotypes; Rhamphastidae; Toucans. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000200006 |
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| Nunes,Rosana dos Reis Abrante; Fagundes,Valéria. |
| We performed a comparative analysis of the nucleolus organizer region (NOR) distribution in the karyotypes of hylid frogs from two different taxonomic groups, Hypsiboas faber and H. semilineatus. Silver nitrate staining of NORs (Ag-NORs) and fluorescence in situ hybridization (FISH) with a rDNA probe were used to investigate the chromosomal location of rDNA loci in two species. The karyotype of H. semilineatus and the Ag-NORs distribution of the four species are presented herein for the first time. After conventional staining, the four species presented very similar karyotypes with 2n = 24, but Ag-NORs analyses revealed species-specific characteristics. H. albomarginatus, H. faber and H. semilineatus had one pair of interstitial Ag-NORs in the... |
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Palavras-chave: Hylids; Hypsiboas; Karyotypes; FISH; Ag-NORs; Hypsiboas semilineatus; H. faber. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500028 |
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| Geise,Lena; Pereira,Luciana G; Astúa,Diego; Aguieiras,Marcia; Lessa,Leonardo G; Asfora,Paulo H; Dourado,Francisco; Esberárd,Carlos E. L. |
| Here we present an extensive survey for non-volant mammals along the margins of the Jequitinhonha River, which represents a contact area between the Cerrado and Atlantic Forest biomes. Our data were obtained after 13 trapping expeditions (from 2005 to 2012) on both banks of the river, from its source to its mouth, enriched by data obtained from a literature review and voucher specimens deposited in six mammal collections. All collected specimens were identified through their karyotypes and/or morphology. We obtained data for 75 localities (34 at the rigth margin, 42 at the left margin; 30 in the Cerrado and 45 in the Atlantic Forest). We obtained voucher records for 91 species, ca. 17% of all known Brazilian terrestrial non-volant mammals. Our results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Barriers; Didelphimorphia; Karyotypes; Rodentia; Species richness. |
| Ano: 2017 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832017000100009 |
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| Registros recuperados: 22 | |
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