Please use this identifier to cite or link to this item: http://repositorio.ufpa.br/jspui/handle/2011/2234
metadata.dc.type: Artigo de Periódico
Issue Date: 2008
metadata.dc.creator: MILHOMEM, Susana Suely Rodrigues
SOUZA, Augusto Cesar Paes de
NASCIMENTO, Aline Lira do
CARVALHO JUNIOR, Jaime Ribeiro
FELDBERG, Eliana
PIECZARKA, Julio Cesar
NAGAMACHI, Cleusa Yoshiko
Title: Cytogenetic studies in fishes of the genera Hassar, Platydoras and Opsodoras (Doradidae, Siluriformes) from Jarí and Xingú Rivers, Brazil
Citation: MILHOMEM, Susana Suely Rodrigues et al. Cytogenetic studies in fishes of the genera Hassar, Platydoras and Opsodoras (Doradidae, Siluriformes) from Jarí and Xingú Rivers, Brazil. Genetics and Molecular Biology, São Paulo, v. 31, n. 1, p. 256-260, 2008. Disponível em: <http://www.scielo.br/pdf/gmb/v31n1s0/17.pdf>. Acesso em: 31 maio 2011. <http://dx.doi.org/10.1590/S1415-47572008000200017>.
Abstract: We studied the karyotypes of Hassar cf. orestis and an undescribed Hassar species from the Jarí River and Opsodoras ternetzi, H. orestis and Platydoras cf. costatus from the Xingú River, all with 2n = 58. Constitutive heterochromatin is located in the centromere in most metacentric pairs; in some chromosomes this banding is not present, or it is located on the whole chromosome arm or in the distal regions. The NOR is located on a single biarmed pair at a distal region of the short arm in H. cf. orestis, H. orestis and P. cf. costatus at a distal region of the long arm in O. ternetzi and at a proximal region of the long arm in the Hassar species. In all species (except for Hassar sp.) the CMA3 analysis revealed a rich G-C region coincident with the NOR. Probably inversions occurred in the NOR chromosome during the chromosomal differentiation of the Doradidae species here described.
Keywords: Doradidae
Bagre
Cromossomos
Peixe
Filogenia
Citogenética
Peixe de água doce
Peixe - Rio Xingu (PA)
ISSN: 1415-4757
metadata.dc.rights: Acesso Aberto
Appears in Collections:Artigos Científicos - ICB

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