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Provedor de dados:  Genet. Mol. Biol.
País:  Brazil
Título:  Intraspecific crosses resulting in the first occurrence of eight and nine B chromosomes in Prochilodus lineatus (Characiformes, Prochilodontidae)
Autores:  Voltolin,Tatiana Aparecida
Senhorini,José Augusto
Foresti,Fausto
Bortolozzi,Jehud
Porto-Foresti,Fábio
Data:  2011-01-01
Ano:  2011
Palavras-chave:  Supernumerary chromosome
Heterochromatic chromosome
Cross-fertilization
Resumo:  B chromosomes are supernumerary elements present in about 15% of eukaryotic species and are most frequently heterochromatic, behave parasitically, show a transmission rate higher than standard (A) chromosomes, and can provoke harmful effects on carriers. In the current work, Prochilodus lineatus individuals carrying eight and nine B chromosomes were obtained by induced crossing performed involving breeders with different B chromosome numbers in their cells. The high B chromosome numbers found in the offspring were recorded for the first time in this species. The use of cytogenetic techniques applied in the present study revealed that regardless of the increase in number of B chromosomes in the genome of these individuals, those elements did not presented active genes, and showed their normal heterochromatic characteristic.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200009
Editor:  Sociedade Brasileira de Genética
Relação:  10.1590/S1415-47572011005000009
Formato:  text/html
Fonte:  Genetics and Molecular Biology v.34 n.2 2011
Direitos:  info:eu-repo/semantics/openAccess
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