Data/hora: 05/06/2024 02:40:03

Provedor de dados: | 103
País: | Brazil
Título: | Cytogenetics of Imparfinis schubarti (Siluriformes: Heptapteridae) from the Piumhi drainage, a diverted river in Minas Gerais State, Brazil
Autores: | Kantek,Daniel L. Z.; Peres,Wellington A. M.; Buckup,Paulo A.; Moreira-Filho,Orlando.
Data: | 2009-12-01
Ano: | 2009
Palavras-chave: | Transposed river; Subclade nemuroglanis; FISH; São Francisco River Basin.
Resumo: | Specimens of Imparfinis schubarti (Gomes, 1956) collected in the Piumhi river drainage, state of Minas Gerais, Brazil, were studied cytogenetically. The river was diverted from the Rio Grande Basin into the São Francisco basin in the early 1960s. All individuals presented 2n = 58 chromosomes, including 18 metacentric, 34 submetacentric and six subtelocentric chromosomes. A secondary constriction was observed in the interstitial region of the long arm of the largest chromosome pair, coinciding with the NOR. A single conspicuous heterochromatic block located in the largest pair of metacentric chromosomes was observed, adjacent to the secondary constriction. A detectable 18S rDNA probe hybridization region occurs in only one chromosome pair and is synthenic with the marking obtained with 5S rDNA probe. These results fit the cytogenetic pattern previously described for the genus Imparfinis Eigenmann &amp;amp; Norris, 1900.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000400018
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S1984-46702009000400018
Formato: | text/html
Fonte: | Zoologia (Curitiba)  v.26 n.4 2009
Fonte: | info:eu-repo/semantics/openAccess