Use este identificador para citar ou linkar para este item: http://repositorio.inpa.gov.br/handle/123/2583
Título: A comparative cytogenetic study of five piranha species (Serrasalmus, Serrasalminae) from the Amazon basin
Autor(es): Celeste Mutuko Nakayama
Jorge Ivan Rebelo Porto
Eliana Feldberg
Assunto: Amazônia
Bacia Amazonica
Peixes
ISSN: 0016-6707
Revista: Genetica (The Hague)
Volume: 114
Resumo: 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 Solimõoes 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 subtelo- and 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.
URI: http://repositorio.inpa.gov.br/handle/123/2583
ISSN: 0016-6707
DOI: http://dx.doi.org/10.1023/A:1016275505655
Local de publicação: Holanda
Aparece nas coleções:Coordenação de Biodiversidade (CBIO)

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