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	Provedor de dados Rev. Bras. Frutic. (2) Genet. Mol. Biol. (1) Neotropical Ichthyology (1) Autor Pierozzi,Neiva Izabel (2) Cestari,Margarete (1) Cipriano,Roger (1) Fenocchio,Alberto (1) Maistro,Edson Luis (1) Nirchio,Mauro (1) Rossetto,Carlos Jorge (1) Silva,Alexandre Rodrigues da (1) Mais... Palavra-chave NOR-banding (4) Karyotype (2) Mitotic chromosomes (2) C-band (1) C-banding (1) Characidium cf. zebra (1) Characidium gomesi (1) Crenuchidae (1) M. indica (1) Mango (1) Meristic and morphometric features (1) Persistent nucleolus (1) Species identification (1) Vitaceae (1) Vitis (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2011 (2) 2006 (1) 2005 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Cytogenetic divergence between two sympatric species of Characidium (Teleostei, Characiformes, Crenuchidae) from the Machado River, Minas Gerais, Brazil Genet. Mol. Biol. Silva,Alexandre Rodrigues da; Maistro,Edson Luis. Cytogenetic studies were performed on two sympatric species of Characidium, C. gomesi and C. cf. zebra, from the Grande River basin, Minas Gerais State, Brazil. Although both species had a chromosome number of 50 with a karyotype exclusively consisting of meta- and submetacentric chromosomes, interspecific diversity was detected concerning the size of the two first chromosome pairs of the karyotypes. Active nucleolus organizer regions (NORs) were located at the terminal position on the long arm of the 17th pair of C. gomesi and at subterminal position on the long arm of the 23rd pair of C. cf. zebra. For both species the fluorochrome CMA3 stained only the NOR-bearing pair of chromosomes. The heterochromatin pattern also showed some differentiation between... Tipo: Info:eu-repo/semantics/article Palavras-chave: Characidium gomesi; Characidium cf. zebra; Crenuchidae; NOR-banding; C-banding. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000300010 Cytogenetical and morphological features reveal significant differences among Venezuelan and Brazilian samples of Mugil curema (Teleostei: Mugilidae) Neotropical Ichthyology Nirchio,Mauro; Cipriano,Roger; Cestari,Margarete; Fenocchio,Alberto. Karyotype of M. curema from the Gulf of Mexico and Brazil have been reported as possessing chromosome complement with 2n=28 and FN=48, whereas specimens from Venezuela has been reported as possessing a diploid number 2n=24 and a conserved FN (48). Although at first sight this variation suggests the presence of a chromosomal intraspecific (interpopulational) variability, the possibility that we are dealing with two different species was examined. This work revisit the karyotypes of M. curema from Venezuela and Brazil, including new data on C-banding, and NOR localization, and compares morphologic characteristics of samples from both localities. Thus, besides diploid number, the constitutive heterochromatin distribution and NORs location, mark other... Tipo: Info:eu-repo/semantics/article Palavras-chave: Karyotype; C-band; NOR-banding; Meristic and morphometric features; Species identification. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000100006 Chromosome characterization of two varieties of Mangifera indica L.¹ Rev. Bras. Frutic. Pierozzi,Neiva Izabel; Rossetto,Carlos Jorge. Chromosome studies were performed in two varieties of Mangifera indica L. (mango), 'IAC-140 Espadona' and in its progenitor 'Espada Stahl'. Both varieties showed 2n=40 chromosomes though the karyotype formulae were 8m + 10sm + 2sm s for 'Stahl' and 7m + 11sm + 2sm s for 'IAC-140'. The varieties showed moderate karyotype asymmetry which was estimated according to four different indices. Both varieties exhibited three chromosome pairs with silver impregnation after NOR-banding. The number of nucleoli within interphase cells varied from one, the commonest, to eight. The nucleolus persistent phenomenon was observed in more than 22% of metaphase cells of both varieties, seeing that in 'Stahl', up to two nucleoli were evidenced. This variety also showed one... Tipo: Info:eu-repo/semantics/article Palavras-chave: Mango; Mitotic chromosomes; Persistent nucleolus; NOR-banding; M. indica. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000500074 Karyotype and NOR-banding of mitotic chromosomes of some Vitis L. species Rev. Bras. Frutic. Pierozzi,Neiva Izabel. Chromosome studies were performed in V. champinii, V. cinerea, V. girdiana, V. labrusca, V. rotundifolia, V. rupestris and V. vinifera with the purpose of species characterization using chromosome morphometric data and NOR banding. A median ideogram was obtained for each species. The karyotype formula obtained varied from 7m + 12sm to 9m + 11sm. The species showed moderate chromosome asymmetry values according to TF% form, Stebbins, Romero Zarco and Paszko indices. V. champinii and V. girdiana were apart from the other species by CVcl and CVci graphic representation and also formed a group apart in the dendrogram based on Euclidian distances. The chromosome pair number 3 harbors the secondary constriction and a satellite segment in all species analyzed... Tipo: Info:eu-repo/semantics/article Palavras-chave: Karyotype; NOR-banding; Mitotic chromosomes; Vitis; Vitaceae. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000500077 Registros recuperados: 4 Primeira ... 1 ... Última

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