Chromosomal differentiation between populations of Oligosarcus hepsetus (Teleostei, Characidae) from small tributaries at opposite margins of the Paraíba do Sul river (Brazil)
Cytogenetic analyses were carried out in two populations of Oligosarcus hepsetus from tributaries at opposite margins of the Paraíba do Sul river. The same diploid number was observed in both populations (2n=50), but they showed remarkable differences related to karyotype formula and distribution of...
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| Format: | Article |
| Language: | English |
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Instituto de Tecnologia do Paraná (Tecpar)
2006-11-01
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| Series: | Brazilian Archives of Biology and Technology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000700016 |
| _version_ | 1818649556099792896 |
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| author | Liano Centofante Luiz Antonio Carlos Bertollo Orlando Moreira-Filho |
| author_facet | Liano Centofante Luiz Antonio Carlos Bertollo Orlando Moreira-Filho |
| author_sort | Liano Centofante |
| collection | DOAJ |
| description | Cytogenetic analyses were carried out in two populations of Oligosarcus hepsetus from tributaries at opposite margins of the Paraíba do Sul river. The same diploid number was observed in both populations (2n=50), but they showed remarkable differences related to karyotype formula and distribution of rDNA sites as revealed by silver nitrate staining and in situ hybridization with 18S probes. The results suggested that the main channel of the Paraíba do Sul river acted as barrier to gene flow between populations.<br>Análises citogenéticas foram realizadas em duas populações de Oligosarcus hepsetus provenientes de riachos de margens opostas do rio Paraíba do Sul. O número diplóide foi o mesmo para ambas as populações (2n=50), porém diferenças significativas foram observadas com relação à fórmula cariotípica e distribuição dos sítios de DNAr detectados pela impregnação por prata e pela hibridação "in situ" com sonda 18S. Estes resultados sugerem que a calha principal do rio Paraíba do Sul estaria atuando como uma barreira para o fluxo gênico entre essas populações. |
| first_indexed | 2024-12-17T01:36:12Z |
| format | Article |
| id | doaj.art-0ea251770b2644b69adaef93efcebb09 |
| institution | Directory Open Access Journal |
| issn | 1516-8913 1678-4324 |
| language | English |
| last_indexed | 2024-12-17T01:36:12Z |
| publishDate | 2006-11-01 |
| publisher | Instituto de Tecnologia do Paraná (Tecpar) |
| record_format | Article |
| series | Brazilian Archives of Biology and Technology |
| spelling | doaj.art-0ea251770b2644b69adaef93efcebb092022-12-21T22:08:27ZengInstituto de Tecnologia do Paraná (Tecpar)Brazilian Archives of Biology and Technology1516-89131678-43242006-11-0149698198710.1590/S1516-89132006000700016Chromosomal differentiation between populations of Oligosarcus hepsetus (Teleostei, Characidae) from small tributaries at opposite margins of the Paraíba do Sul river (Brazil)Liano CentofanteLuiz Antonio Carlos BertolloOrlando Moreira-FilhoCytogenetic analyses were carried out in two populations of Oligosarcus hepsetus from tributaries at opposite margins of the Paraíba do Sul river. The same diploid number was observed in both populations (2n=50), but they showed remarkable differences related to karyotype formula and distribution of rDNA sites as revealed by silver nitrate staining and in situ hybridization with 18S probes. The results suggested that the main channel of the Paraíba do Sul river acted as barrier to gene flow between populations.<br>Análises citogenéticas foram realizadas em duas populações de Oligosarcus hepsetus provenientes de riachos de margens opostas do rio Paraíba do Sul. O número diplóide foi o mesmo para ambas as populações (2n=50), porém diferenças significativas foram observadas com relação à fórmula cariotípica e distribuição dos sítios de DNAr detectados pela impregnação por prata e pela hibridação "in situ" com sonda 18S. Estes resultados sugerem que a calha principal do rio Paraíba do Sul estaria atuando como uma barreira para o fluxo gênico entre essas populações.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000700016Fishheadstreamcytogeneticdifferentiation |
| spellingShingle | Liano Centofante Luiz Antonio Carlos Bertollo Orlando Moreira-Filho Chromosomal differentiation between populations of Oligosarcus hepsetus (Teleostei, Characidae) from small tributaries at opposite margins of the Paraíba do Sul river (Brazil) Brazilian Archives of Biology and Technology Fish headstream cytogenetic differentiation |
| title | Chromosomal differentiation between populations of Oligosarcus hepsetus (Teleostei, Characidae) from small tributaries at opposite margins of the Paraíba do Sul river (Brazil) |
| title_full | Chromosomal differentiation between populations of Oligosarcus hepsetus (Teleostei, Characidae) from small tributaries at opposite margins of the Paraíba do Sul river (Brazil) |
| title_fullStr | Chromosomal differentiation between populations of Oligosarcus hepsetus (Teleostei, Characidae) from small tributaries at opposite margins of the Paraíba do Sul river (Brazil) |
| title_full_unstemmed | Chromosomal differentiation between populations of Oligosarcus hepsetus (Teleostei, Characidae) from small tributaries at opposite margins of the Paraíba do Sul river (Brazil) |
| title_short | Chromosomal differentiation between populations of Oligosarcus hepsetus (Teleostei, Characidae) from small tributaries at opposite margins of the Paraíba do Sul river (Brazil) |
| title_sort | chromosomal differentiation between populations of oligosarcus hepsetus teleostei characidae from small tributaries at opposite margins of the paraiba do sul river brazil |
| topic | Fish headstream cytogenetic differentiation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000700016 |
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