B-chromosome frequency stability in Prochilodus lineatus (Characiformes, Prochilodontidae)
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/03/2010
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Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The genus Prochilodus includes individuals ranging in size from medium to large, being highly relevant for commercial and subsistence fishing. Prochilodus species have a diploid number of 2n = 54 chromosomes and up to seven supernumerary (B) microchromosomes. Previous research has shown that B frequency increased drastically in the Mogi-Gua double dagger u river population of Prochilodus lineatus in the early 1980s, whereas it remained about constant in the 1990s. Here we analyses B frequency in this population during the 2003-2007 period and have found that frequency has not changed significantly since 1987, and that these B chromosomes do not show the intra-individual variation in number that characterized them in the 1980s. This indicates that these B chromosomes have been neutralized, after their invasion, through their mitotic stabilization. |
Formato |
281-284 |
Identificador |
http://dx.doi.org/10.1007/s10709-009-9420-9 Genetica. Dordrecht: Springer, v. 138, n. 3, p. 281-284, 2010. 0016-6707 http://hdl.handle.net/11449/18521 10.1007/s10709-009-9420-9 WOS:000274087700001 |
Idioma(s) |
eng |
Publicador |
Springer |
Relação |
Genetica |
Direitos |
closedAccess |
Palavras-Chave | #Mitotic stability #Supernumerary chromosomes #Accumulation #Neutralization |
Tipo |
info:eu-repo/semantics/article |