Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/14959
Título: Cytogenetic studies in fishes of the genera Hassar, Platydoras and Opsodoras (Doradidae, Siluriformes) from Jarí and Xingú Rivers, Brazil
Autor: Milhomem, Susana Suely Rodrigues
Souza, Augusto César Paes de
Nascimento, Aline Lira do
Carvalho, Jaime Ribeiro
Feldberg, Eliana
Pieczarka, Júlio César
Nagamachi, Cleusa Yoshiko
Palavras-chave: Centromere
Chromosome Analysis
Chromosome Arm
Chromosome Banding Pattern
Chromosome Inversion
Chromosome Nor
Chromosome Pairing
Chromosome Structure
Constitutive Heterochromatin
Controlled Study
Cytotaxonomy
Female
Fish
Fish Genetics
Gc Rich Sequence
Hassar
Hassar Orestis
Karyotyping
Male
Evolution, Molecular
Nonhuman
Opsodoras
Opsodoras Ternetzi
Platydoras
Platydoras Costatus
River
Siluriformes
Species Comparison
Doradidae
Hassar (catfish)
Hassar Orestis
Opsodoras
Opsodoras Ternetzi
Pisces
Platydoras
Platydoras Costatus
Siluriformes
Data do documento: 2008
Revista: Genetics and Molecular Biology
É parte de: Volume 31, Número 1 SUPPL. 1, Pags. 256-260
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. Copyright © 2008, Sociedade Brasileira de Genética.
DOI: 10.1590/S1415-47572008000200017
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