|
|
|
| Registros recuperados: 16 | |
|
|
| Margarido,Vladimir Pavan; Galetti Junior,Pedro Manoel. |
| This is the first description of the karyotype of Leporinus desmotes. The diploid female number was 2n = 54 meta- and submetacentric chromosomes. The nucleolar organizing regions (NORs) were studied by silver nitrate staining and rDNA fluorescence in situ hybridization (FISH) and were found to be located in the telomeric region of the long arm of the 9th pair. C-banding revealed centromeric and telomeric heterochromatin segments in most chromosomes. Intercalar blocks of heterochromatin were observed in the long arm of six chromosome pairs. Besides a NOR-adjacent heterochromatin, all of the intercalar heterochromatic segments were brightly fluorescent by mithramycin staining. These data suggest that a unique amplification of a primordial GC-rich... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000300012 |
| |
|
| |
|
|
| Aguilar,Cecilia Teixeira de; Galetti Junior,Pedro Manoel. |
| Among the anostomid fishes, the genus Leporellus is represented by only three species: L. nattereri, endemic of the Amazon River, L. retropinnis, endemic of the Piracicaba River, and L. vittatus, widely distributed in rivers from Peru, Colombia, Guianas, and different major hydrographic basins of Brazil. A cytogenetic study carried out on specimens of Leporellus vittatus from three major Brazilian hydrographic basins evidenced a karyotype of 54 metacentric and submetacentric chromosomes. C-banding analysis revealed the presence of large pericentromeric heterochromatic segments in all chromosomes and a telomeric block coincident with the NOR sites. Ag, CMA3 or MM staining, and FISH with ribosomal probes located the 45S ribosomal genes on the terminal region... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Karyotype; C-bands; 45S rDNA; 5S rDNA. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200004 |
| |
|
| |
|
| |
|
|
| Gonçalves,Michelle Mantovani; Lemos,Manoel Victor Franco; Galetti Junior,Pedro Manoel; Freitas,Patrícia Domingues de; Furtado Neto,Manuel Antonio Andrade. |
| The Pacific white shrimp, Litopenaeus vannamei (Penaeidae), represents about 95% of all Brazilian shrimp production. The Brazilian L. vannamei foundation broodstock was made up of specimens collected from different American Pacific sites, but little information was collected on the genetic structure of the broodstock. We used the fluorescence amplified fragment length polymorphism (fAFLP) method to study the genetic diversity of L. vannamei broodstock lines 03CMF1 and 03CBF1 originally produced by breeder-shrimps imported mainly from Panama and Ecuador, although wild individuals from other localities may also have been used in producing these two lines. Our results showed a total of 93 polymorphic bands ranging from 50 to 500 bp, the mean Nei's genetic... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: FAFLP; Genetic diversity; Litopenaeus vannamei; Penaeidae; Shrimp. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200016 |
| |
|
| |
|
| |
|
|
| Artoni,Roberto Ferreira; Molina,Wagner Franco; Bertollo,Luis Antonio Carlos; Galetti Junior,Pedro Manoel. |
| The chromosomes of two neotropical freshwater fish species, namely Liposarcus anisitsi (Siluriformes, Loricariidae) and Leporinus elongatus (Characiformes, Anostomidae), were investigated by means of C-banding, Ag-NORs, fluorochrome staining and banding by hot saline solution (HSS) treatment, to reveal patterns of heterochromatin differentiation. The karyotype of L. anisitsi is described for the first time. Staining with the GC-specific fluorescent antibiotic mithramycin (MM) revealed bright signals in some C-banded blocks in both species, suggesting that these MM+ heterochromatin contains GC-rich DNA. Banding by denaturation employing HSS, followed by Giemsa staining, yielded corresponding results documenting the thermal stability of GC-rich DNA part of... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000100009 |
| |
|
|
| Hatanaka,Terumi; Tambasco,Antonio Junqueira; Galetti Junior,Pedro Manoel. |
| Few cytogenetic studies have been conducted on South American canids. Cerdocyon thous is a representative of the Canidae, living in the forests, open wooded areas and savannahs of South America. Compared to other canid species, C. thous has a large proportion of metacentric and submetacentric chromosomes as well as a large amount of constitutive heterochromatin, especially along the short arm of submetacentric chromosomes. In the present study, different chromosome banding methods were used to characterize the heterogeneous nature of the large heterochromatic segments and to propose an organizational model for this segment that occupies the entire short arm of most two-armed chromosomes. Furthermore, chromosome heteromorphism related to the short arm of... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571998000200009 |
| |
|
| |
|
| |
|
| |
|
|
| Lunardi,Vitor de Oliveira; Francisco,Mercival Roberto; Rocha,Guaracy Tadeu; Goldschmidt,Beatriz; Galetti Junior,Pedro Manoel. |
| Neotropical parrots are among the most threatened groups of birds in the world, and many species are facing extinction in a near future. At the same time, the taxonomic position of many species remains unclear. Karyotype analysis has been used to elucidate the phylogenetic status of many bird groups, also providing important information for both in situ and ex situ conservation plans. The objective of the present study was to describe for the first time the karyotypes of the endangered Hyacinth Macaw, Anodorhynchus hyacinthinus, and of the Hawk-headed Parrot, Deroptyus accipitrinus. A diploid number of 2n = 70 and a karyotype similar to the main pattern previously found for the genera Ara, Cyanopsitta, Aratinga, Propyrrhura, Pionites, Pionopsitta,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avian karyotype; Anodorhynchus; Deroptyus; Psittaciformes; Conservation biology; Cytotaxonomy. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300011 |
| |
|
| |
| Registros recuperados: 16 | |
|
|
|
