Cytogenetics of Imparfinis schubarti (Siluriformes: Heptapteridae) from the Piumhi drainage, a diverted river in Minas Gerais State, Brazil
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, includ...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Zoologia
2009-12-01
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| Series: | Zoologia (Curitiba) |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000400018 |
| _version_ | 1797964978605522944 |
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| author | Daniel L. Z. Kantek Wellington A. M. Peres Paulo A. Buckup Orlando Moreira-Filho |
| author_facet | Daniel L. Z. Kantek Wellington A. M. Peres Paulo A. Buckup Orlando Moreira-Filho |
| author_sort | Daniel L. Z. Kantek |
| collection | DOAJ |
| description | 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 & Norris, 1900. |
| first_indexed | 2024-04-11T01:53:01Z |
| format | Article |
| id | doaj.art-5ec976b4c4264d37bed0a9b39911fbd2 |
| institution | Directory Open Access Journal |
| issn | 1984-4670 1984-4689 |
| language | English |
| last_indexed | 2024-04-11T01:53:01Z |
| publishDate | 2009-12-01 |
| publisher | Sociedade Brasileira de Zoologia |
| record_format | Article |
| series | Zoologia (Curitiba) |
| spelling | doaj.art-5ec976b4c4264d37bed0a9b39911fbd22023-01-03T05:55:50ZengSociedade Brasileira de ZoologiaZoologia (Curitiba)1984-46701984-46892009-12-0126473373810.1590/S1984-46702009000400018Cytogenetics of Imparfinis schubarti (Siluriformes: Heptapteridae) from the Piumhi drainage, a diverted river in Minas Gerais State, BrazilDaniel L. Z. KantekWellington A. M. PeresPaulo A. BuckupOrlando Moreira-FilhoSpecimens 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 & Norris, 1900.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000400018Transposed riversubclade nemuroglanisFISHSão Francisco River Basin |
| spellingShingle | Daniel L. Z. Kantek Wellington A. M. Peres Paulo A. Buckup Orlando Moreira-Filho Cytogenetics of Imparfinis schubarti (Siluriformes: Heptapteridae) from the Piumhi drainage, a diverted river in Minas Gerais State, Brazil Zoologia (Curitiba) Transposed river subclade nemuroglanis FISH São Francisco River Basin |
| title | Cytogenetics of Imparfinis schubarti (Siluriformes: Heptapteridae) from the Piumhi drainage, a diverted river in Minas Gerais State, Brazil |
| title_full | Cytogenetics of Imparfinis schubarti (Siluriformes: Heptapteridae) from the Piumhi drainage, a diverted river in Minas Gerais State, Brazil |
| title_fullStr | Cytogenetics of Imparfinis schubarti (Siluriformes: Heptapteridae) from the Piumhi drainage, a diverted river in Minas Gerais State, Brazil |
| title_full_unstemmed | Cytogenetics of Imparfinis schubarti (Siluriformes: Heptapteridae) from the Piumhi drainage, a diverted river in Minas Gerais State, Brazil |
| title_short | Cytogenetics of Imparfinis schubarti (Siluriformes: Heptapteridae) from the Piumhi drainage, a diverted river in Minas Gerais State, Brazil |
| title_sort | cytogenetics of imparfinis schubarti siluriformes heptapteridae from the piumhi drainage a diverted river in minas gerais state brazil |
| topic | Transposed river subclade nemuroglanis FISH São Francisco River Basin |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000400018 |
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