Data/hora: 06/06/2024 02:10:45

Provedor de dados: | 42
País: | Brazil
Título: | Transmission rate variation among three B chromosome variants in the fish Prochilodus lineatus (Characiformes, Prochilodontidae)
Autores: | PENITENTE,MANOLO; VOLTOLIN,TATIANA A.; SENHORINI,JOSé A.; BORTOLOZZI,JEHUD; FORESTI,FAUSTO; PORTO-FORESTI,FáBIO.
Data: | 2013-01-01
Ano: | 2013
Palavras-chave: | Supernumerary chromosomes; Controlled crosses; Curimbatá; Cytogenetic; Inheritance.
Resumo: | 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 mechanism and follows a Mendelian transmission rate.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401371
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201387611
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.85 n.4 2013
Fonte: | info:eu-repo/semantics/openAccess