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	Provedor de dados Genet. Mol. Biol. (2) Autor Cardoso,Adauto Lima (2) Nagamachi,Cleusa Yoshiko (2) Pieczarka,Julio Cesar (2) Oliveira,Jonas Alves de (1) Silva,Fernando Henrique Ramos (1) Silva,Patrícia Corrêa da (1) Mais... Palavra-chave Biodiversity (1) Chromosomal rearrangements (1) FISH (1) Fluorochromes (1) Meiosis (1) Sex chromosome fusion (1) Sexual trivalent (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2015 (1) 2014 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Chromosomal diversity in three species of electric fish (Apteronotidae, Gymnotiformes) from the Amazon Basin Genet. Mol. Biol. Silva,Fernando Henrique Ramos; Pieczarka,Julio Cesar; Cardoso,Adauto Lima; Silva,Patrícia Corrêa da; Oliveira,Jonas Alves de; Nagamachi,Cleusa Yoshiko. Cytogenetic studies were carried out on samples of Parapteronotus hasemani, Sternarchogiton preto and Sternarchorhamphus muelleri (Apteronotidae, Gymnotiformes) from the Amazon basin. The first two species exhibited both a 2n = 52 karyotype, but differed in their karyotypic formulae, distribution of constitutive heterochromatin, and chromosomal location of the NOR. The third species, Sternarchorhamphus muelleri, was found to have a 2n = 32 karyotype. In all three species the DAPI and chromomycin A3 staining results were consistent with the C-banding results and nucleolar organizer region (NOR) localization. The 18S rDNA probe confirmed that there was only one pair of ribosomal DNA cistron bearers per species. The telomeric probe did not reveal interstitial... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fluorochromes; FISH; Chromosomal rearrangements; Biodiversity. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000500006 X1X1X2X2/X1X2Y sex chromosome systems in the Neotropical Gymnotiformes electric fish of the genus Brachyhypopomus Genet. Mol. Biol. Cardoso,Adauto Lima; Pieczarka,Julio Cesar; Nagamachi,Cleusa Yoshiko. Several types of sex chromosome systems have been recorded among Gymnotiformes, including male and female heterogamety, simple and multiple sex chromosomes, and different mechanisms of origin and evolution. The X1X1X2X2/X1X2Y systems identified in three species of this order are considered homoplasic for the group. In the genus Brachyhypopomus, only B. gauderio presented this type of system. Herein we describe the karyotypes of Brachyhypopomus pinnicaudatus and B. n. sp. FLAV, which have an X1X1X2X2/X1X2Y sex chromosome system that evolved via fusion between an autosome and the Y chromosome. The morphology of the chromosomes and the meiotic pairing suggest that the sex chromosomes of B. gauderio and B. pinnicaudatus have a common origin, whereas in B . n.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Sex chromosome fusion; Sexual trivalent; Meiosis. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000200213 Registros recuperados: 2 Primeira ... 1 ... Última

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