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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

B-chromosomes in two Brazilian populations of Dendropsophus nanus (Anura, Hylidae)

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Author(s):
Lilian R. Medeiros [1] ; Denise C. Rossa-Feres [2] ; Jorge Jim [3] ; Shirlei M. Recco-Pimentel [4]
Total Authors: 4
Affiliation:
[1] Universidade Estadual de Campinas. Instituto de Biologia. Departamento de Biologia Celular - Brasil
[2] Universidade Estadual Paulista. Instituto de Biociências. Departamento de Zoologia e Botânica - Brasil
[3] Universidade Estadual Paulista. Departamento de Zoologia - Brasil
[4] Universidade Estadual de Campinas. Instituto de Biologia. Departamento de Biologia Celular - Brasil
Total Affiliations: 4
Document type: Journal article
Source: GENETICS AND MOLECULAR BIOLOGY; v. 29, n. 2, p. 257-262, 2006-00-00.
Field of knowledge: Biological Sciences - Morphology
Abstract

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. (AU)