First report of a B chromosome in a natural population of Astyanax altiparanae (Characiformes, Characidae)
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/01/2008
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Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Several species of the genus Astyanax have already been genetically studied, and B-chromosomes have been considered to be an interesting feature in some species of this group. In the present paper we report, for the first time, the occurrence of a B microchromosome in a natural population of A. altiparanae. This additional genomic element was identified as an acrocentric chromosome, similar in size to the smallest chromosomal pairs of the standard karyotype. Analysis of the constitutive heterochromatin pattern by C-banding evidenced heterochromatic blocks located on centromeric, pericentromeric, and interstitial regions of some chromosomes, and also positive marks in a subtelocentric chromosomal pair that presented the short arms entirely heterochromatic. The application of this methodology also revealed a heterochromatic pattern in the extra chromosome, a typical feature of supernumerary chromosomes. |
Formato |
275-278 |
Identificador |
http://dx.doi.org/10.1590/S1415-47572008000200021 Genetics and Molecular Biology. Sociedade Brasileira de Genética, v. 31, n. 1, p. 275-278, 2008. 1415-4757 http://hdl.handle.net/11449/8174 10.1590/S1415-47572008000200021 S1415-47572008000200021 WOS:000257238500021 S1415-47572008000200021.pdf |
Idioma(s) |
eng |
Publicador |
Sociedade Brasileira de Genética |
Relação |
Genetics and Molecular Biology |
Direitos |
openAccess |
Palavras-Chave | #B chromosomes #fish cytogenetics #Astyanax altiparanae |
Tipo |
info:eu-repo/semantics/article |