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	Provedor de dados ArchiMer (1) Neotropical Ichthyology (1) Autor Carballal, M. J. (1) Diaz, S. (1) Feldberg,Eliana (1) Leitao, A. (1) Matias, A. M. (1) Mesquita,Débora R. (1) Porto,Jorge I. R. (1) Teixeira De Sousa, Joana (1) Villalba, A. (1) Mais... Palavra-chave Microchromosomes (2) Cerastoderma edule (1) Cytogenetics (1) Discus (1) Disseminated neoplasia (1) Karyotype (1) Multiple NORs (1) Polymorphism (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Text (1) Ano 2014 (1) 2008 (1) País Brazil (1) France (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Chromosomal variability in the wild ornamental species of Symphysodon (Perciformes: Cichlidae) from Amazon Neotropical Ichthyology Mesquita,Débora R.; Porto,Jorge I. R.; Feldberg,Eliana. Cytogenetic studies were conducted on three discus species which inhabit the Amazon in Brazil: Symphysodon haraldi from Manacapuru, S. aequifasciatus from Tefé and S. discus from Barcelos. All individuals showed 2n=60 chromosomes, most of them biarmed. No sexual chromosomal heteromorphism was verified. However, different karyotypic formulae, owing to the presence of subtelocentric chromosomes, were verified for S. aequifasciatus and S. discus. One of the karyotypic formulae from S. aequifasciatus (cytotype 2) differs from the others, due to one of the homologues in the first chromosome pair being significantly larger than the other. A large variability was observed toward the nucleolar organizer regions (NOR) of S. haraldi and S. aequifasciatus. Although... Tipo: Info:eu-repo/semantics/article Palavras-chave: Discus; Cytogenetics; Polymorphism; Microchromosomes; Multiple NORs. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200005 Karyotype variation in neoplastic cells associated to severity of disseminated neoplasia in the cockle Cerastoderma edule ArchiMer Matias, A. M.; Diaz, S.; Teixeira De Sousa, Joana; Villalba, A.; Carballal, M. J.; Leitao, A.. Disseminated neoplasia (DN) is characterized by an abnormal cell proliferation, usually resulting in death of the affected mollusks. In the present study we performed, for the first time, karyotypes of two different stages of DN in the cockle Cerastoderma edule. Analysis of moderate (N2) and high (N3) severity neoplasic metaphases displayed a chromosome number ranging from 57 to 317, instead of the normal diploid number of 38. Cockles with N2 showed a lower percentage of microchromosomes and a higher ploidy than those with N3. The comparison of both cytogenetic profiles contributes to better understand the evolution of DN in cockles. Tipo: Text Palavras-chave: Karyotype; Disseminated neoplasia; Cerastoderma edule; Microchromosomes. Ano: 2014 URL: http://archimer.ifremer.fr/doc/00184/29550/27876.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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