Consulta: subjectFacets:"B-chromosome cytogenetics Dendropsophus supernumerary chromosome"
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Data/hora: 16/06/2024 15:45:36

B-chromosomes in two Brazilian populations of Dendropsophus nanus (Anura, Hylidae)
Provedor de dados: Genetics and Molecular Biology
Autores: Medeiros,Lilian R.; Rossa-Feres,Denise C.; Jim,Jorge; Recco-Pimentel,Shirlei M.
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
Palavras-chave: Anura; B-chromosome cytogenetics Dendropsophus supernumerary chromosome.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200010