Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 30
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
A comparative cytogenetic analysis between the grasshopper species Chromacris nuptialis and C. speciosa (Romaleidae): constitutive heterochromatin variability and rDNA sites. Repositório Alice
LORETO, V.; STADTLER, E.; MELO, N. F. de; SOUZA, M. J..
The chromosomes of Chromacris nuptialis and C. speciosa were comparatively analyzed using different cytogenetic techniques, in order to determine the level of karyotypic similarities and differences between the species.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Heterocromatografia; NOR; Chromacris nuptials; Cytogenetic; Citogenética; Cariótipo; Chromacris Speciosa; Gafanhoto; Fish.
Ano: 2005 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/156668
Imagem não selecionada

Imprime registro no formato completo
Apomixia em Manihot esculenta e em seus hibridos interespecificos. Repositório Alice
SOUSA, E. dos S. de.
O objetivo deste trabalho foi estudar a citogenética e a morfologia do saco embrionário dos clones EB1 (Manihot esculenta Crantz) e EB12 (gera-ção F3 de M. esculenta x M. glaziovii Muell), dos híbridos F1 e F2 de M. neusana Nassar x M. esculenta e da espécie silvestre M. neusana, para verificar o fenômeno da apomixia. Os óvulos foram analisados pelo método de clarificação. Foi verificada apomixia, do tipo apospórica, no clone EB12, no híbrido F2, e em M. neusana. Foi demonstrada a estrutura embriônica da mandioca; foram observados dois sacos embrionários no mesmo óvulo do híbrido F2.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Citogenetica; Heterozigose; Apomixia aposporica; Cytogenetic; Heterozigosity; Apospory apomixis.
Ano: 2001 URL: http://www.alice.cnptia.embrapa.br/handle/doc/104014
Imagem não selecionada

Imprime registro no formato completo
Backcrossing to increase meiotic stability in triticale. Repositório Alice
GIACOMIN, R. M.; ASSIS, R.; BRAMMER, S. P.; NASCIMENTO JUNIOR, A. do; SILVA, P. R. da..
2015
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: X Triticosecale; Wittmack; Meiosis; Pollen viability; Plant breeding; Cytogenetic; Triticale.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1029920
Imagem não selecionada

Imprime registro no formato completo
Chromosomal differentiation between populations of Oligosarcus hepsetus (Teleostei, Characidae) from small tributaries at opposite margins of the Paraíba do Sul river (Brazil) BABT
Centofante,Liano; Bertollo,Luiz Antonio Carlos; Moreira-Filho,Orlando.
Cytogenetic analyses were carried out in two populations of Oligosarcus hepsetus from tributaries at opposite margins of the Paraíba do Sul river. The same diploid number was observed in both populations (2n=50), but they showed remarkable differences related to karyotype formula and distribution of rDNA sites as revealed by silver nitrate staining and in situ hybridization with 18S probes. The results suggested that the main channel of the Paraíba do Sul river acted as barrier to gene flow between populations.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish; Headstream; Cytogenetic; Differentiation.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000700016
Imagem não selecionada

Imprime registro no formato completo
Chromosome damage in underground coal miners: detection by conventional cytogenetic techniques and by submitting lymphocytes of unexposed individuals to plasma from at-risk groups Braz. J. Genet.
Agostini,J.M.S.; Otto,P.A.; Wajntal,A..
Chromosome abnormalities and the mitotic index in lymphocyte cultures and micronuclei in buccal mucosa cells were investigated in a sample of underground mineral coal miners from Southern Brazil. A decreased mitotic index, an excess of micronuclei and a higher frequency of chromosome abnormalities (fragments, polyploidy and overall chromosome alterations) were observed in the miners when compared to age-paired normal controls from the same area. An alternative assay for clastogenesis in occupational exposition was tested by submitting lymphocytes from non-exposed individuals to a pool of plasmas from the exposed population. This assay proved to be very convenient, as the lymphocytes obtained from the same individuals can be used as target as well as...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosome damage; Underground coal miners; Cytogenetic; Lymphocytes; Plasma; At-risk groups.
Ano: 1996 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551996000400021
Imagem não selecionada

Imprime registro no formato completo
Chromosomes of Theridiidae spiders (Entelegynae): interspecific karyotype diversity in Argyrodes and diploid number intraspecific variability in Nesticodes rufipes Genet. Mol. Biol.
Stavale,Leila Miguel; Schneider,Marielle Cristina; Araujo,Douglas; Brescovit,Antonio Domingos; Cella,Doralice Maria.
Theridiidae is a derived family within the Araneoidea clade. In contrast to closely related groups, the 2n(male) = 20+X1X2 with acro/telocentric chromosomes is the most widespread karyotype among the theridiid spiders. In this work, the cytogenetic analysis of Argyrodes elevatus revealed original chromosome features different from those previously registered for Theridiidae, including the presence of 2n(male) = 20+X with meta/submetacentric chromosomes. Most individuals of Nesticodes rufipes showed family conserved karyotype characteristics. However, one individual had a 2n(male) = 24 due to the presence of an extra chromosome pair, which exhibited regular behavior and reductional segregation during meiosis. After silver staining, mitotic cells exhibited...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosome morphology; Cytogenetic; Meiosis; Nucleolar organizer region; Sex chromosome system.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400012
Imagem não selecionada

Imprime registro no formato completo
Citogenética de duas espécies de Zephyranthes Herb. (Amaryllidaceae - Hipeastreae) cultivadas. Repositório Alice
FELIX, W. J. P.; ALMEIDA, A.; MELO, N. F. de; FELIX, L. P..
O gênero Zephyranthes compreende cerca de 65 espécies de distribuição principalmente neotropical, das quais, 36 são reconhecidas para o Brasil. É um grupo cariologicamente variável, com números cromossômicos desde 2n=10, em Zephyranthes seubertii E. P. Hume [1], até 2n=ca. 200, em um híbrido horticultural interespecífico [2]. Apresenta registro cromossômico para 54 espécies, com ocorrência de variação cromossômica numérica decorrente de poliploidia, aneuploidia e disploidia [3]. O objetivo deste estudo foi descrever o cariótipo de Z. candida e Z. rosea, visando estudar as semelhanças e diferenças numéricas e estruturais entre os seus cariótipos, assim como, identificar os mecanismos de evolução cromossomos envolvidos na formação dos mesmos.
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Zephyranthes; Z rosea; Rosea; Z candida; Candida; Morfologia; Citogenética; Cytogenetic.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/162413
Imagem não selecionada

Imprime registro no formato completo
Citogenética de Paspalum. I. Avaliação do comportamento meiótico em acessos com diferentes níveis de ploidia. Repositório Alice
CARRARO, L. R.; FREITAS, P. M. de; ADAMOWSKI, E. de V.; SILVA, N.; PAGLIARINI, M. S.; BATISTA, L. A. R..
1997
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Citogenética; Paspalum; Comportamento meiótico; Cytogenetic.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/handle/doc/44169
Imagem não selecionada

Imprime registro no formato completo
Citogenética de Paspalum. II. Determinação do número de cromossomos. Repositório Alice
FREITAS, P. M. de; CARRARO, L. R.; TAKAYAMA, S. Y.; ADAMOWSKI, E. de V.; PAGLIARINI, M. S.; BATISTA, L. A. R..
1997
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Cromossomo; Paspalum; Citogenética; Cytogenetic; Chromosomes.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/handle/doc/44160
Imagem não selecionada

Imprime registro no formato completo
Cytogenetic study of pure breed and hybrid wild boar (Sus Scrofa Scrofa) in Southeast and South Brazil MV&Z
Lui, Jeffrey Frederico.
From December of 1977 to March of 1999, cytogenetic analyses were carried out with 1,137 boars from South and Southeast areas of Brazil. Three genetic groups of animal were cytogenetically identified: a) 2n=36 classified as pure wild boars, b) 2n=37, hybrid and c) 2n=38, called "Javaporco", ploidy which is equal to domestic pig. Being a subspecies as the domestic pig, the wild boars present facility in this breeding allowing the happening of different genetic groups in herd where the reproductive control is not appropriate.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cytogenetic; Wild boar; Chromosomes; Sus scrofa scrofa citogenética; Javali; Cromossomos; Sus scrofa scrofa.
Ano: 2000 URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3351
Imagem não selecionada

Imprime registro no formato completo
Cytogenetics of Pennisetum purpureum Schumack x Pennisetum glaucum L. hybrids and their parents Ciência e Agrotecnologia
Barbosa,Sandro; Davide,Lisete Chamma; Pereira,Antônio Vander.
Cytogenetic studies were carried out on five accesses of interspecific hybrids of Pennisetum purpureum and Pennisetum glaucum and their parentals, which are part of the Forage Germplasm Bank of the "Centro Nacional de Pesquisa de Gado de Leite" of EMBRAPA, Brazil. The mitotic cytogenetic analysis, performed using stain by Schiff reactive, confirmed the chromosome number of 2n = 14, 28 and 21 for the accesses of P. glaucum, P. purpureum and their hybrids, respectively. For each access, descriptions of the chromosome complement and idiograms are presented which allowed to establish the karyotypic relationships between the hybrids and their parentals. Based on the total chromosomal length data it was possible to establish the karyotype classification of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Elephant grass; Pearl millet; Interspecific hybrids; Cytogenetic; Ideograms; Chromosome.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542003000100003
Imagem não selecionada

Imprime registro no formato completo
Cytological studies in four species of Mesosetum (Arthropogoninae) reveal the lowest chromosome number among the Neotropical Poaceae. Repositório Alice
RIBEIRO, A. R. O.; SOUSA, M. W. S.; OLIVEIRA, R. C. de; ARAUJO, A. C. G.; FAGG, C. W.; POZZOBON, M. T..
2015
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Meiotic behaviour; Monocots; Reproduction; Grass; Cytogenetic.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1030474
Imagem não selecionada

Imprime registro no formato completo
Cytotaxonomy of some species and of interspecific hybrids of Pennisetum (Poaceae, Poales) Genet. Mol. Biol.
Techio,Vânia Helena; Davide,Lisete Chamma; Pereira,Antônio Vander; Bearzoti,Eduardo.
Cytotaxonomic studies were carried out on 26 accessions of Pennisetum spp. originating from the Active Germplasm Bank of Embrapa Gado de Leite-Juiz de Fora, Minas Gerais, Brazil.This study presents cytogenetics and reproductive morphological data for each one of these accessions, which allowed groupings and suggest botanical identifications to be established. The metaphases of the accessions characterized as P. purpureum confirmed the presence of 2n = 28 chromosomes that have already been described for this species. For the hybrids between P. purpureum and P. glaucum and for the hexaploids, resulting from the chromosome duplication of these hybrids, 2n = 21 and 2n = 42 chromosomes were confirmed, respectively. The wild accession identified as P. setosum...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pennisetum; Cytogenetic; Taxonomy; Germplasm; Genetic divergence.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000200014
Imagem não selecionada

Imprime registro no formato completo
Description of a new species and the karyotype of the cavernicolous millipede Pseudonannolene Silvestri and the karyotype of Pseudonannolene strinatti Mauriès (Diplopoda, Pseudonannolenida, Pseudonannolenidae) Zoologia
Fontanetti,Carmem Silvia.
Pseudonannolene tocaiensis, sp.n. is described from Brazil, São Paulo, Itirapina. The karyotypes of P. tocaiensis, sp.n. and P. strinatti Mauriès, 1974 are also presented, both species are found in cave environments. P. tocaiensis has 2n=20, XY and P. strinatti, 2n=16; it was not possible to observe the sex determination mechanism in the latter.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diplopoda; Pseudonannolene; Cave millipedes; Cytogenetic; Millipedes.
Ano: 1996 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000200012
Imagem não selecionada

Imprime registro no formato completo
Detection of diploid males in a natural colony of the cleptobiotic bee Lestrimelitta sp (Hymenoptera, Apidae) Genet. Mol. Biol.
Tavares,Mara Garcia; Carvalho,Carlos Roberto; Soares,Fernanda Aparecida Ferrari; Fernandes,Anderson.
When working at quantifying the genome size of stingless bees, it was observed that males of Lestrimelitta sp possessed the same amount of nuclear DNA as the females. Thus, we used flow cytometry (FCM) and cytogenetic analysis to confirm the ploidy of these individuals. The males analyzed proved to be diploid, since, through cytometric analysis, it was demonstrated that the mean genome size of both males and females was the same (C = 0.463 pg), and, furthermore, cytogenetic analysis demonstrated that both had 2n = 28 chromosomes.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cytogenetic; Flow cytometry; Genome size; Karyotype; Stingless bee.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300019
Imagem não selecionada

Imprime registro no formato completo
Distribution of Oecomys catherinae Thomas, 1909 (Rodentia: Cricetidae) in northeastern Brazil with karyotypical and morphometrical notes Biota Neotropica
Asfora,Paulo Henrique; Palma,Alexandre Ramlo Torre; Astúa,Diego; Geise,Lena.
The genus Oecomys Thomas, 1906 is currently composed of 16 species with unclear taxonomy and poorly known geographic limits. O. catherinae Thomas, 1909 is known to occur within the Brazilian Atlantic Forest from the states of Santa Catarina to Pernambuco (where the northernmost previously known specimen of Oecomys in the Atlantic forest was recorded), and along riverine forest into the Cerrado. To gain a greater understanding of its geographical and ecological distribution (mainly in Northeastern Brazil) and of its taxonomic characterization, we provide a short review of karyotypical and morphometrical data from specimens collected within the distribution range of the species. Specimens presented 2n = 60 and AN varying between 62 and 64. A table with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Small mammals; New register; Sigmodontinae; Cytogenetic; Morphometrics.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000200039
Imagem não selecionada

Imprime registro no formato completo
Diversity and chromosomal evolution in the genusAncistrusKner, 1854 (Loricariidae: Ancistrini) from three hydrographic basins of Mato Grosso State, Brazil Neotropical Ichthyology
Mariotto,Sandra; Centofante,Liano; Moreira-Filho,Orlando.
Cytogenetic analyses were carried out in 117 specimens of seven species of the genus Ancistrus from three hydrographic in Mato Grosso State: Paraguay, Araguaia-Tocantins and Amazon basins. Conventional cytogenetic techniques were used to obtain mitotic chromosomes. C-banding was performed to detect heterochromatic regions and silver nitrate staining was used to identify nucleolar organizer regions (Ag-NORs). The counted and paired chromosomes revealed diploid numbers ranging from 2n = 40 to 2n = 54 with karyotype formulae varying from FN = 80 to FN = 86. Single marks in distinct chromosomes identified the nucleolar organizer regions. The constitutive heterochromatin was scarce in the diploid number from 2n = 50 to 2n = 54 and conspicuous blocks were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: AgNOR; Cytogenetic; Diploid number; Heterochromatin.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100125
Imagem não selecionada

Imprime registro no formato completo
Efeito da colchicina e da escarificação de sementes na obtenção de plantas tetraploides de melancia. Repositório Alice
SILVA, C. M. de; MELO, N. F. de; DIAS, R. de C. S.; SANTOS, J. S. dos; SOUZA, F. de F..
O objetivo deste trabalho foi avaliar o efeito de doses de colchicina e da escarificação de sementes na obtenção de plantas tetraploides de melancia.
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Colchicina; Planta tetraploide; Duplicação cromossômica; Citrullus lanatus; Melancia; Citogenética; Semente; Watermelon; Chromossome duplication; Colchicine; Cytogenetic.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1087034
Imagem não selecionada

Imprime registro no formato completo
Estudo citogenetico em bovinos da raca Holandesa preta e branca portadores ou nao do virus da leucose bovina. Repositório Alice
TAMBASCO, D.; TAMBASCO, A. J.; OLIVEIRA, M. C. de S.; BARBOSA, P.F..
1996
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Citogenetica; Bovino; Leucose bovina; Gado de corte; Cytogenetic; Bovine; Beef Cattle.
Ano: 1996 URL: http://www.alice.cnptia.embrapa.br/handle/doc/44377
Imagem não selecionada

Imprime registro no formato completo
Étude chez l'huître creuse, Crassostrea gigas, des anomalies génomiques provoquées par l'exposition à des concentrations environnementales de diuron : caractérisation des atteintes, étude de leur héritabilité et conséquences pour la survie et la croissance des naissains ArchiMer
Barranger, Audrey.
The aims of this PhD were to determine (1) the effects of the herbicide diuron on the genome of the oyster, Crassostrea gigas, (2) the possible transmission to the offspring of damaged DNA and (3) its consequences on oyster physiology. The genotoxicity of diuron and the vertical transmission of DNA damage were highlighted after parental exposure to environmental concentrations of diuron during the gametogenesis. Primary DNA lesions were detected in both somatic cells and germ cells of exposed genitors. Detection of the oxidized base 8-oxodGuo in gonads shows that exposure to diuron led to an oxidative stress which likely explains the observed DNA strand breaks in spermatozoa. The transmission of these DNA damage was confirmed by fluorescent in situ...
Tipo: Text Palavras-chave: Crassostrea gigas; Herbicide; Diuron; Génotoxicité; Effets trans-générationnels; Cytogénétique; Test des comètes; Cytométrie en flux; Crassostrea gigas; Herbicide; Diuron; Genotoxicity; Trans-generational effects; Cytogenetic; Comet assay; Flow cytometry.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00271/38237/36419.pdf
Registros recuperados: 30
Primeira ... 12 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional