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Transmission rate variation among three B chromosome variants in the fish Prochilodus lineatus (Characiformes, Prochilodontidae)
Provedor de dados: 42
Autores: PENITENTE,MANOLO; VOLTOLIN,TATIANA A.; SENHORINI,JOSé A.; BORTOLOZZI,JEHUD; FORESTI,FAUSTO; PORTO-FORESTI,FáBIO.
Cytogenetic studies were developed in Prochilodus lineatus (Valenciennes 1836), describing an interesting system of small supernumerary chromosomes. The purpose of this work is to study the frequency and morphology of B chromosomes in individuals from the parental line and the inheritance patterns of these elements in individuals obtained from controlled crosses in the species P. lineatus. The transmission rate of B chromosomes revealed a kB=0.388 for the acrocentric type, a kB=0.507 for the metacentric type and a kB=0.526 for the submetacentric type. The obtained results raise hypothesis that B-acrocentric chromosomes are involved in an extinction process in this species, while the metacentric and submetacentric supernumerary elements comprises a neutral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Supernumerary chromosomes; Controlled crosses; Curimbatá; Cytogenetic; Inheritance.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401371