Data/hora: 16/06/2024 16:02:56

Provedor de dados: | Genetics and Molecular Biology
País: | Brazil
Título: | B-chromosomes in two Brazilian populations of Dendropsophus nanus (Anura, Hylidae)
Autores: | Medeiros,Lilian R.; Rossa-Feres,Denise C.; Jim,Jorge; Recco-Pimentel,Shirlei M.
Data: | 2006-01-01
Ano: | 2006
Palavras-chave: | Anura; B-chromosome cytogenetics Dendropsophus supernumerary chromosome.
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%) and in 9 out of 15 specimens (60%) 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200010
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572006000200010
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.29 n.2 2006
Fonte: | info:eu-repo/semantics/openAccess