| Registro completo |
| Provedor de dados: |
Genet. Mol. Biol.
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| País: |
Brazil
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| Título: |
Cytogenetic comparison of Podocnemis expansa and Podocnemis unifilis: a case of inversion and duplication involving constitutive heterochromatin
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| Autores: |
Gunski,Ricardo José
Cunha,Isabel Souza
Degrandi,Tiago Marafiga
Ledesma,Mario
Garnero,Analía Del Valle
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| Data: |
2013-01-01
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| Ano: |
2013
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| Palavras-chave: |
Chromosome banding
Ag-NORs
Karyotype
Chelonids
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| Resumo: |
Podocnemis expansa and P. unifilis present 2n = 28 chromosomes, a diploid number similar to those observed in other species of the genus. The aim of this study was to characterize these two species using conventional staining and differential CBG-, GTG and Ag-NOR banding. We analyzed specimens of P. expansa and P. unifilis from the state of Tocantins (Brazil), in which we found a 2n = 28 and karyotypes differing in the morphology of the 13th pair, which was submetacentric in P. expansa and telocentric in P. unifilis. The CBG-banding patterns revealed a heterochromatic block in the short arm of pair 13 of P. expansa and an interstitial one in pair 13 of P. unifilis, suggesting a pericentric inversion. Pair 14 of P. unifilis showed an insterstitial band in the long arm that was absent in P. expansa, suggesting a duplication in this region. Ag-NORs were observed in the first chromosome pair of both species and was associated to a secondary constriction and heterochromatic blocks.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000300009
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| Editor: |
Sociedade Brasileira de Genética
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| Relação: |
10.1590/S1415-47572013005000029
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| Formato: |
text/html
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| Fonte: |
Genetics and Molecular Biology v.36 n.3 2013
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| Direitos: |
info:eu-repo/semantics/openAccess
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