Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 7
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Cytogenetic characterization of seven South American species of nereididae (annelida: polychaeta): implications for the karyotypic evolution JBAG
Ipucha,María Claudia; Gomes Santos,Cinthya; Da Cunha Lana,Paulo; Sbalqueiro,Ives José.
This paper describes, for the first time, the cytogenetic characteristics of some South Atlantic nereidid polychaetes, collected in Paranaguá Bay, southeast Brazil. Mitotic chromosomes were obtained from regenerative tissue after amputation of the posterior tips of the animals. Seven species, of five genera, were analyzed: 1) Platynereis dumerilii (2n=28; FN=56), which is considered cosmopolitan but is suspected to be a species-complex. Karyotypic divergences were detected when comparing chromosome morphology and NOR distribution from Paraná and North American populations (2n=28; FN=56), 2) Perinereis vancaurica (2n=28; FN=56), P. anderssoni (2n=28; FN=56) and P. ponteni (2n=28; FN=54). Karyotypes and NOR distribution allowed us to relate P. anderssoni...
Tipo: Info:eu-repo/semantics/article
Ano: 2007 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332007000200003
Imagem não selecionada

Imprime registro no formato completo
Description of the karyotype of Rhagomys rufescens Thomas, 1886 (Rodentia, Sigmodontinae) from Southern Brazil Atlantic forest Genet. Mol. Biol.
Testoni,André Filipe; Althoff,Sérgio Luiz; Nascimento,André Paulo; Steiner-Souza,Francisco; Sbalqueiro,Ives José.
Rhagomys rufescens (Rodentia: Sigmodontinae) is an endemic species of the Atlantic forest from Southern and Southeastern Brazil. Some authors consider Rhagomys as part of the tribe Thomasomyini; but its phylogenetic relationships remain unclear. Chromosomal studies on eight specimens of Rhagomys rufescens revealed a diploid number of 2n = 36 and a number of autosome arms FN = 50. GTG, CBG and Ag-NOR banding and CMA3/DAPI staining were performed on metaphase chromosomes. Eight biarmed and nine acrocentric pairs were found in the karyotype of this species. The X and Y chromosomes were both acrocentric. Most of the autosomes and the sex chromosomes showed positive C-bands in the pericentromeric region. The X chromosome showed an additional heterochromatic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rhagomys rufescens; Thomasomyini; Rodentia; Atlantic forest; Karyotype.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300017
Imagem não selecionada

Imprime registro no formato completo
Evaluation of genetic variability in the collared peccary Pecari tajacu and the white-lipped peccary Tayassu pecari by microsatellite markers Genet. Mol. Biol.
Silva,Roxane Wirschum; Freitas,Thales R.O. de; Sbalqueiro,Ives José.
In this study, the microsatellite technique was used to evaluate the genetic variability in populations of collared and white-lipped peccaries kept in captivity. Six primers developed for domestic pigs were used and amplified in both species. They revealed the presence of five polymorphic loci and one monomorphic locus. The polymorphic loci included 4 of the 16 alleles in collared peccaries, and 3 of the 10 alleles in the white-lipped peccaries. Polymorphic information content (PIC) in both species and all the loci was highly informative. The probability of paternity exclusion (PEC), if one of the parents is known, was almost as high in white-lipped peccaries (95.53%) as in the collared (99,48%). The Fst values for collared (0.042) and white-lipped...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microsatellite markers; Tayassu pecari; Pecari tajacu; Genetic variability; Animals of captivity.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000100012
Imagem não selecionada

Imprime registro no formato completo
Identificação das espécies brasileiras de Akodon (Rodentia: Cricetidae: Sigmodontinae) através da microestrutura dos pelos Biota Neotropica
Silveira,Fabiana; Sbalqueiro,Ives José; Monteiro-Filho,Emygdio Leite de Araujo.
No Brasil há 10 espécies de Akodon Meyen, 1833 e a maioria apresenta algum grau de sobreposição geográfica havendo inclusive registros de simpatia. A identificação das espécies é difícil e pode ser feita pela análise da estrutura morfológica de pelos. Assim, para a identificação da microestrutura de pelos de nove espécies brasileiras de Akodon, foram utilizados pelos-guardas primários de amostras de coleções zoológicas. Foi adotado o método de análise das escamas cuticulares e da medula. O padrão de cutícula para todas as espécies foi folidáceo estreito. Já para a medula foram reconhecidos três padrões básicos como multisseriada alveolar, multisseriada listrada e misto de alveolar e listrada. Akodon cursor é a única espécie com predomínio de quatro...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Roedores; Escamas cuticulares; Pelos-guarda; Morfologia; Medula.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000100033
Imagem não selecionada

Imprime registro no formato completo
Occurrence of Akodon cursor (Rodentia, Cricetidae) with 14, 15 and 16 chromosome cytotypes in the same geographic area in Southern Brazil Braz. J. Genet.
Sbalqueiro,Ives José; Nascimento,André Paulo.
The karyotype of Akodon cursor (initially identified as A. arviculoides) had been reported with chromosomal numbers 14 and 15 in the South and Southeast and 16 in Northeastern Brazil. We found the three cytotypes in a region of Southern Brazil. The G-band patterns of these specimens were the same as those from southeastern and northeastern regions. Seventeen different combinations of chromosomes due to a complex rearrangement in pair 1 and pericentric inversions in pairs 2 and 3 were identified. Seven of these combinations are new to in the literature.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Akodon cursor; Chromosome cytotypes; Southern Brazil.
Ano: 1996 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551996000400005
Imagem não selecionada

Imprime registro no formato completo
The karyotype of Alouatta fusca clamitans from Rio de Janeiro, Brazil: Evidence for a y-autosome translocation Genet. Mol. Biol.
Oliveira,Edivaldo H.C. de; Lima,Margarida M.C. de; Sbalqueiro,Ives José; Pissinati,Alcides.
The chromosome complements of four males of Alouatta fusca clamitans, caught in Rio de Janeiro State, Brazil, were analyzed by G-, C-, and NOR-banding techniques. The diploid number found was 49 in all the specimens. The presence of a heteromorphic pair of submetacentric chromosomes in the analyzed specimens, not present in males and females with 2n = 50 previously reported, and its G-banding pattern, led us to assume that this pair is involved in a Y-autosome translocation. Thus, the sex determination system appears modified to X1X1X2X2 /X1X2Y. Heterochromatic segments were found in the pericentromeric region of all the chromosomes, in the telomeric region of the short arm in pair 2, in the complete length of the short arm of pairs 5 and 6 and in the...
Tipo: Info:eu-repo/semantics/article
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571998000300012
Imagem não selecionada

Imprime registro no formato completo
Unexpected chromosomal alterations in Tayassu tajacu (Artiodactyla: Tayassuidae) in captivity Braz. J. Vet. Res. Anim. Sci.
Lima,José Fernando de Sousa; Guedes,Fátima Becker; Silva,Roxane Wirschum; Hass,Iris; Cavalli,Iglenir João; Silva,Juliana da; Freitas,Thales Renato de; Sbalqueiro,Ives José.
Wild animals have been used as bioindicators in situations in which the environment was exposed to chemical agents. In general, chemical agents may induce chromosomal aberrations, such as breaks and gaps. The peccary, Tayassu tajacu is a pig relative that exhibits a very stable karyotype with the only described alterations being of the form of the X chromosome. Chromosomal gaps and breaks were observed at high frequencies during cytogenetics analyses. These alterations were observed in the chromosomes autossomics. Reviews of the literature and of the data described herein suggests that an vermifuge, the ivermectin base, was the most likely cause of these chromosomal alterations.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tayassu; Karyotype; Chromosome; Chromosomal alterations.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962004000100002
Registros recuperados: 7
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional