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| Santos,Dayane Petik dos; Felicetti,Denise; Baumgärtner,Lucas; Margarido,Vladimir Pavan; Blanco,Daniel Rodrigues; Moreira-Filho,Orlando; Lui,Roberto Laridondo. |
| ABSTRACT Auchenipteridae is divided into subfamilies Centromochlinae and Auchenipterinae. Parauchenipterus is included in the latter and is subject of taxonomic discussions concerning its validation or synonymization with Trachelyopterus. Herein, three species from two hydrographic basins were cytogenetically analyzed: Parauchenipterus striatulus from Doce River and two sympatric species, P. galeatus and Trachelyopterus coriaceus, from the Araguaia River. Diploid number of 58 chromosomes was verified for all species, but P. striatulus has different karyotype formula from the others. The three species have heterochromatin located in terminal regions of almost all chromosomes and in pericentromeric region on acrocentric chromosomes. Simple NORs was verified... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cryptic species; FISH; Parauchenipterus; Problematic taxonomy; 5S rDNA. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100214 |
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| Lui,Roberto Laridondo; Blanco,Daniel Rodrigues; Martinez,Juliana de Fátima; Margarido,Vladimir Pavan; Venere,Paulo Cesar; Moreira Filho,Orlando. |
| Ageneiosus is the most widely distributed genus of the family Auchenipteridae among South American river basins. Although chromosome studies in the family are scarce, this genus has the largest number of analyzed species, with 2n = 54 to 56 chromosomes, differing from the rest of the family (2n = 58). This study aimed to analyze Ageneiosus inermis from the Araguaia River basin. The diploid number found was of 56 chromosomes. Heterochromatin was allocated in terminal region of most chromosomes, plus a pericentromeric heterochromatic block in pair 1, a pair distinguished by size in relation to other chromosomes pairs. AgNORs were detected in only one submetacentric chromosome pair, which was confirmed by FISH. 5S rDNA was present in only one metacentric... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: C banding; Cytogenetic Markers; [GATA]n sequence; RDNA-FISH; [TTAGGG]n sequence. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000200327 |
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