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

Cytogenetic characterization of distinct B chromosomes in a population of the fish Astyanax bockmanni (Teleostei, Characiformes)

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Author(s):
Daniel, Sandro Natal [1] ; Hashimoto, Diogo Teruo [1] ; Pansonato-Alves, Jose Carlos [2] ; Foresti, Fausto [2] ; Porto-Foresti, Fabio [1]
Total Authors: 5
Affiliation:
[1] Univ Estadual Paulista, Fac Ciencias, Dept Ciencias Biol, BR-17033360 Bauru, SP - Brazil
[2] Univ Estadual Paulista, Inst Biociencias, Dept Morfol, BR-18618000 Botucatu, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Caryologia; v. 65, n. 3, p. 229-233, 2012.
Web of Science Citations: 10
Abstract

Individuals of Astyanax bockmanni from one population belonging to the Paranapanema River basin, southeastern Brazil, were cytogenetically examined. In the present paper, we report a diploid number of 50 chromosomes, with some individuals bearing additional chromosomes, characterized as different variants of B chromosomes. The B microchromosome of acrocentric morphology (B-a) was the most frequent type in this population (77.7%). Two other variants were identified as metacentric B chromosomes, but of distinct sizes, characterized as macrochromosome (B-M) and microchromosome (B-m). Conspicuous heterochromatic blocks were observed in the terminal regions of some chromosomes of the standard karyotype and partially heterochromatic blocks were detected in all B chromosomes. 18S ribosomal RNA genes were distributed in the terminal region of several chromosomes, but were not located on the B chromosomes. (AU)

FAPESP's process: 10/06919-8 - Cytogenetic characterization of individuals of the species Astyanax bockmanni (Teleostei, Characiformes) bearing different types of supranumerary chromosomes
Grantee:Sandro Natal Daniel
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 11/15007-5 - Study of chromosomal structure of Astyanax bockmanni (Teleostei, Characiformes) in different populations: focus on B chromosomes
Grantee:Sandro Natal Daniel
Support Opportunities: Scholarships in Brazil - Master