Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/19046
Título: A comparative cytogenetic study of five piranha species (Serrasalmus, serrasalminae) from the Amazon basin
Autor: Nakayama, Celeste Mutuko
Porto, Jorge Ivan Rebelo
Feldberg, Eliana
Palavras-chave: Animals
Chromosome Analysis
Chromosome Banding Pattern
Classification
Evolution
Female
Fish
Genetics
Karyotyping
Male
Animal
Chromosome Banding
Cytogenetic Analysis
Evolution
Female
Fishes
Karyotyping
Male
Animalsia
Characiformes
Robertsonia
Serrasalminae
Serrasalmus
Serrasalmus Compressus
Serrasalmus Spilopleura
Data do documento: 2002
Revista: Genetica
Encontra-se em: Volume 114, Número 3, Pags. 231-236
Abstract: Cytogenetic studies were conducted on five piranha species belonging to the genus Serrasalmus, subfamily Serrasalminae (Serrasalmus altispinis, S. compressus, S. elongatus, S. manuelli, and S. spilopleura). All the species were collected in the Amazon basin: confluence of Negro and Solimões Rivers (CatalãoLake), Solimões River (Marchantaria Island - Camaleão Lake), Uatumã River (Hydroelectric Power Station of Balbina), and Pitinga River (Hydroelectric Power Station of Pitinga). All the five species possess 2n = 60 chromosomes with 5-12 subteloand acrocentric chromosomes bearing nucleolar organizer regions. A proximal C-band positive heterochromatin block was evident on the long arms of a medium-sized metacentric chromosome pair in all the analized species, thus making it a cytogenetic marker for the genus. It is hypothesized that 2n = 60 chromosomes represents a derived feature in terms of the chromosomal evolution of piranhas because the basal lineages possess 2n = 62. Both Robertsonian centric fusion and non-Robertsonian rearragements such as pericentric inversions seem implicated in the chromosomal evolution of this group.
DOI: 10.1023/A:1016275505655
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