B-chromosomes in two Brazilian populations of Dendropsophus nanus (Anura, Hylidae)
Genet. mol. biol
; 29(2): 257-262, 2006. ilus, tab
Article
em En
| LILACS
| ID: lil-432694
Biblioteca responsável:
BR26.1
RESUMO
We report on the presence of B-chromosomes in two populations of Dendropsophus nanus (= Hyla nana Boulenger, 1889) from São Paulo State, Brazil. Such chromosomes were observed in 4 out of 43 specimens (9.3 percent) and in 9 out of 15 specimens (60 percent) from the municipalities of Nova Aliança and Botucatu, respectively. The karyotype 2n = 30 + 1B found in D. nanus was similar to that of other species with 2n = 30 chromosomes, except for the presence of an additional small telocentric chromosome. In one specimen from Botucatu, cells with one to three extra chromosomes were observed. These B-chromosomes appeared as univalent in meiosis I and did not bear a nucleolar organizer region or exhibit constitutive heterochromatin.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Anuros
/
Cromossomos
Limite:
Animals
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Genet. mol. biol
Ano de publicação:
2006
Tipo de documento:
Article
/
Project document