Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 20
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Cytogenetic characterization of F1, F2 and backcross hybrids of the Neotropical catfish species Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum (Pimelodidae, Siluriformes) Genet. Mol. Biol.
Prado,Fernanda Dotti do; Nunes,Tatiana Leite; Senhorini,José Augusto; Bortolozzi,Jehud; Foresti,Fausto; Porto-Foresti,Fábio.
The cytogenetic characteristics of Pseudoplatystoma corruscans and Pseudoplatystoma reticulatum and their F1, F2 and backcross hybrids were assessed by using chromosome banding techniques. The diploid number of 56 chromosomes was constant in all species and lineages, with a karyotypic formula containing 20 metacentric, 12 submetacentric, 12 subtelocentric and 12 acrocentric chromosomes. Nucleolar organizer regions (NORs) were identified in two subtelocentric chromosomes in the parents and hybrids, with partial nucleolar dominance in F1 and F2 specimens. Heterochromatic blocks were detected in the terminal and centromeric regions of some chromosomes in all individuals. For parental and hybrid lineages, 18S ribosomal clusters corresponding to NORs and 5S...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Backcrossing; Cytogenetics; Interspecific hybrids; Post-F1 hybrids; Pseudoplatystoma.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000100008
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
Description of Amazonian Theobroma L. collections, species identification, and characterization of interspecific hybrids Acta Botanica
Silva,Carlos Rogério Sousa; Venturieri,Giorgini Augusto; Figueira,Antonio.
There are two major in vivo collections of species of the genus Theobroma L. in Belém and Marituba, state of Pará, Brazil, and in both there are natural species, as well as natural and artificial interspecific hybrids. In order to organize a database of Brazilian Theobroma species, a description of the existing collections and detailed information about the interspecific hybrids, including an artificial key for their identification, are presented in this article.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Interspecific hybrids; Theobroma; Germplasm; Herrania.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062004000200012
Imagem não selecionada

Imprime registro no formato completo
Differential transcription of ribosomal cistrons denoting nucleolar dominance in hybrids of Drosophila mulleri and Drosophila navojoa (mulleri complex, Repleta group) Genet. Mol. Biol.
Commar,Leliane Silva; Bicudo,Hermione E.M.C.; Rahal,Paula; Ceron,Carlos Roberto.
The fruit flies Drosophila mulleri and Drosophila navojoa are included in the mulleri complex of the mulleri subgroup and Repleta group. Although there is no demonstration that interspecific crosses between them occur in nature, they intercross in the laboratory in both cross directions. Previous data have shown the occurrence of nucleolar dominance in interspecific hybrids of some species in the mulleri complex. We investigated nucleolar dominance in D. mulleri/D. navojoa hybrids using the transcription profiles of the rDNA internal transcribed spacer (ITS-1) region. The results showed that the ribosomal cistrons present in the X chromosome and in the microchromosome of D. navojoa are exclusively or preferentially transcribed in these hybrids depending on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosophila mulleri; D. navojoa; Interspecific hybrids; Nucleolar dominance; RDNA.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600028
Imagem não selecionada

Imprime registro no formato completo
Genomic behavior of hybrid combinations between elephant grass and pearl millet. Repositório Alice
LEÃO, F. F.; DAVIDE, L. C.; CAMPOS, J. M. S. de; PEREIRA, A. V.; BUSTAMANTE, F. de O..
The objective of this work was to evaluate the genomic behavior of hybrid combinations between elephant grass (Pennisetum purpureum) and pearl millet (P. glaucum). Tetraploid (AAA'B) and pentaploid (AA'A'BB) chromosome races resulting from the backcross of the hexaploid hybrid to its parents elephant grass (A'A'BB) and pearl millet (AA) were analyzed as to chromosome number and DNA content. Genotypes of elephant grass, millet, and triploid and hexaploid induced hybrids were compared. Pentaploid and tetraploid genomic combinations showed high level of mixoploidy, in discordance with the expected somatic chromosome set. The pentaploid chromosome number ranged from 20 to 34, and the tetraploid chromosome number from 16 to 28. Chromosome number variation was...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: DNA content; Interspecific hybrids; Mixoploidy; Pennisetum glaucum; Pennisetum purpureum.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/handle/doc/901800
Imagem não selecionada

Imprime registro no formato completo
Genomic behavior of hybrid combinations between elephant grass and pearl millet PAB
Leão,Fernando Ferreira; Davide,Lisete Chamma; Campos,José Marcello Salabert de; Pereira,Antonio Vander; Bustamante,Fernanda de Oliveira.
The objective of this work was to evaluate the genomic behavior of hybrid combinations between elephant grass (Pennisetum purpureum) and pearl millet (P. glaucum). Tetraploid (AAA'B) and pentaploid (AA'A'BB) chromosome races resulting from the backcross of the hexaploid hybrid to its parents elephant grass (A'A'BB) and pearl millet (AA) were analyzed as to chromosome number and DNA content. Genotypes of elephant grass, millet, and triploid and hexaploid induced hybrids were compared. Pentaploid and tetraploid genomic combinations showed high level of mixoploidy, in discordance with the expected somatic chromosome set. The pentaploid chromosome number ranged from 20 to 34, and the tetraploid chromosome number from 16 to 28. Chromosome number variation was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pennisetum glaucum; Pennisetum purpureum; DNA content; Interspecific hybrids; Mixoploidy.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000700006
Imagem não selecionada

Imprime registro no formato completo
Hybrids between Pseudoplatystoma corruscans and P. reticulatum (Siluriformes: Pimelodidae) previously reported in the Upper Paraná River are likely escapes from aquaculture farms: evidence from microsatellite markers Rev. Bras. Zool.
Baggio,Rafael A.; Moretti,Caroline B.; Bialetzki,Andréa; Boeger,Walter A..
ABSTRACT The production of hybrids of the 'pintado', Pseudoplatystoma corruscans (Spix & Agassiz, 1829) and 'cachara', Pseudoplatystoma reticulatum (Eigenmann & Eigenmann, 1889) in captivity has generated many concerns about the possibility of introduction of farmed hybrids into natural environments. In the last decade, hybrids between these species, known as 'pintachara' or 'cachapinta', were reported from different regions of the Upper Paraná River basin. Prospection of these hybrids is important in order to orient conservation programs for the species involved. Knowledge of the presence of these hybrids will direct conservation strategies towards prevention and/or mitigation of the effects of cross breeding in natural populations of P....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conservation genetics; Fish larvae; Interspecific hybrids; Introgression; Molecular markers.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000201303
Imagem não selecionada

Imprime registro no formato completo
Interspecific hybridization in oysters: Restriction enzyme digestion chromosome banding confirms Crassostrea angulata x Crassostrea gigas F1 hybrids ArchiMer
Leitao, A; Chaves, R; Santos, S; Guedes Pinto, H; Boudry, Pierre.
The taxonomic status of the two commercially important cupped oysters, Crassostrea angulata, the Portuguese oyster (Lamarck, 1819) and Crassostrea gigas, the Japanese oyster (Thunberg, 1793) has long been in question. The recent observation of the hybridization between C. gigas and C. angulata and the production of fertile F1s led us to search for cytogenetic evidence of both parental genomes in the interspecific hybrids. The cytogenetic characterization of the hybrids was performed by the use of restriction endonuclease treatments. This technique has recently shown the potential for individual chromosome identification by banding in oysters. Chromosomes of C. gigas, C. angulata and their hybrids were treated with two different restriction enzymes (ApaI...
Tipo: Text Palavras-chave: Interspecific hybrids; In situ restriction enzyme banding; Crassostrea gigas; C. angulata; Chromosome banding.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-4959.pdf
Imagem não selecionada

Imprime registro no formato completo
Karyotype alterations after hybridization between Pennisetum purpureum AND Pennisetum glaucum. Repositório Alice
REIS, G. B. dos; ANDRADE-VIEIRA, L. F.; CAMPOS, J. M. S. de; PEREIRA, A. V.; DAVIDE, L. C..
2015
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Interspecific hybrids; Chromosome morphology; DNA content; In situ hybridization.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1036020
Imagem não selecionada

Imprime registro no formato completo
KARYOTYPE ALTERATIONS AFTER HYBRIDIZATION BETWEEN Pennisetum purpureum AND Pennisetum glaucum Ciência e Agrotecnologia
Reis,Gabriela Barreto dos; Andrade-Vieira,Larissa Fonseca; Campos,José Marcello Salabert de; Pereira,Antonio Vander; Davide,Lisete Chamma.
ABSTRACTNapier grass and pearl millet are tropical forages from the genus Pennisetum. The variability in those species is explored in breeding programs of forages, as well as in the production of interspecific hybrids. Hybridization is a phenomenon that leads to intergenomic conflicts following the elimination of genomic sequences. In this sense, the present work aimed to study the genomic alterations occurring after interspecific hybridization of pearl millet and Napier grass with the use of cytogenetics and flow cytometry tools. These methods allowed the evaluation of chromosome morphometry, DNA content and genomic ratio in pearl millet, Napier grass and hybrids. It was observed that pearl millet and Napier grass have chromosomes with superposed size....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Interspecific hybrids; Chromosome morphology; DNA content; In situhybridization.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000500443
Imagem não selecionada

Imprime registro no formato completo
Meiosis in elephant grass (Pennisetum purpureum), pearl millet (Pennisetum glaucum) (Poaceae, Poales) and their interspecific hybrids Genet. Mol. Biol.
Techio,Vânia Helena; Davide,Lisete Chamma; Pereira,Antônio Vander.
The cultivated and sexually compatible species Pennisetum purpureum (elephant grass, 2n = 4x = 28) and Pennisetum glaucum (pearl millet, 2n = 2x = 14) can undergo hybridization which favors the amplification of their genetic background and the introgression of favorable alleles into breeding programs. The main problem with interspecific hybrids of these species is infertility due to triploidy (2n = 3x = 21). This study describes meiosis in elephant grass x pearl millet hybrids and their progenitors. Panicles were prepared according to the conventional protocol for meiotic studies and Alexander’s stain was used for assessing pollen viability. Pearl millet accessions presented regular meiosis with seven bivalents and high pollen viability. For elephant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Meiosis; Pennisetum; Elephant grass; Interspecific hybrids; Pearl millet; Pollen.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200025
Imagem não selecionada

Imprime registro no formato completo
Mortality investigation of Mytilus edulis and Mytilus galloprovincialis in France: An experimental survey under laboratory conditions ArchiMer
Benabdelmouna, Abdellah; Garcia, Celine; Ledu, Christophe; Lamy, Pierre; Maurouard, Elise; Degremont, Lionel.
In the context of mass mortality outbreaks affecting adult and juvenile mussels since 2014 in France, two investigations were conducted to study mussel mortality under laboratory conditions in 2015. The first investigated the horizontal transmission of a putative causal agent of the mortality among two stocks of wild Mytilus edulis and the potential genetic resistance of adults and their progenies. The second evaluated the resistance of pure and hybrid crosses of M. edulis and M. galloprovincialis at the spat stage to a mortality outbreak. For the first time in France, we described several mortality outbreaks affecting spat and adult mussels under laboratory conditions. Mortality was observed for seawater temperatures ranging from 10 to 23 °C, although the...
Tipo: Text Palavras-chave: Mytilus edulis; Mytilus galloprovincialis; Interspecific hybrids; Mortality outbreaks.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00445/55696/57364.pdf
Imagem não selecionada

Imprime registro no formato completo
Número cromossômico em acessos de Pennisetum spp. (Poaceae, Poales) - DOI: 10.4025/actascibiolsci.v30i3.5016 Biological Sciences
Techio, Vânia Helena; UNC; Davide, Lisete Chamma; UFLA; Souza, Tatiana Matioli; 3Bios Consultoria e Serviços Ambientais Ltda; Pereira, Antônio Vander; EMBRAPA-MG.
Avaliou-se o complemento cromossômico de 16 acessos de Pennisetum disponíveis na Coleção de Germoplasma da Embrapa Gado de Leite – Juiz de Fora, Estado de Minas Gerais. Para a avaliação citogenética, utilizou-se a técnica de esmagamento e coloração com Feulgen. Para quatro acessos foram obtidas metáfases com 2n = 28 cromossomos, confirmando sua classificação como P. purpureum. A origem híbrida P. purpureum x P. glaucum foi constatada em oito acessos, os quais apresentaram 2n = 21. Em um acesso identificado como híbrido entre P. purpureum x P. glaucum, foram observadas metáfases com 2n = 54, permitindo inferir que não se trata de um híbrido interespecífico triplóide. Para outros três acessos avaliados, também foram observadas células com 2n = 54, embora...
Palavras-chave: 2.00.00.00-6 Ciências Biológicas Pennisetum; Citogenética; Germoplasma; Híbridos interespecíficos. Pennisetum; Cytogenetics; Germplasm; Interspecific hybrids.
Ano: 2008 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5016
Imagem não selecionada

Imprime registro no formato completo
Protoplast production from napier grass and pearl millet triploid hybrids. Repositório Alice
TIMBÓ, A. L. de O.; DAVIDE, L. C.; PINTO, J. E. B. P.; PEREIRA, A. V..
2010
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Pennisetum purpureum; Pennisetum glaucum; In vitro cultivation; Interspecific hybrids; Forage.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/handle/doc/868965
Imagem não selecionada

Imprime registro no formato completo
Protoplast production from napier grass and pearl millet triploid hybrids Ciência e Agrotecnologia
Timbó,Ana Luiza de Oliveira; Davide,Lisete Chamma; Pinto,José Eduardo Brasil Pereira; Pereira,Antônio Vander.
The objective of this work was to obtain protoplasts from napier grass and pearl millet triploid hybrids as a basis for future studies on chromosomal duplication. Explants were taken from mesophyll of in vitro- and in vivo-cultured plants or from calli of two triploid hybrids (H1 and H2), which were treated with enzymatic solutions containing different concentrations of cellulase R-10 (0.5, 1.0, 1.5 and 2.0%) with an additional 0.2% macerozyme and 0.1% driselase or 1.0% pectolyase Y-23 and 0.5% hemicellulase. Enzymatic digestion was monitored once every hour for five hours. Protoplasts were obtained from in vitro and in vivo leaflets of both triploid hybrids, and in vitro leaflets were the best explant sources. The quantity of produced protoplasts varied...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pennisetum purpureum; Pennisetum glaucum; In vitro cultivation; Interspecific hybrids; Forage.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542010000500020
Imagem não selecionada

Imprime registro no formato completo
Prunus rootstocks influence peach leaf and fruit nutrient content. Repositório Alice
REIGHARD, G. L.; BRIDGES, W.; RAUH, B.; MAYER, N. A..
2013
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Prunus persica; Nitrogen; Interspecific hybrids; Nectarine; Plum; Almond.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/980228
Imagem não selecionada

Imprime registro no formato completo
Successful crosses between fungal-resistant wild species of Arachis (section Arachis) and Arachis hypogaea. Repositório Alice
FAVERO, A. P.; SANTOS, R. F. dos; SIMPSON, C. E.; VALLS, J. F. M.; VELLO, N. A..
2015
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Peanut; Interspecific hybrids; Polyploidization; Colchicine; Pollen viability.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1029193
Imagem não selecionada

Imprime registro no formato completo
Successful crosses between fungal-resistant wild species of Arachis (section Arachis) and Arachis hypogaea Genet. Mol. Biol.
Fávero,Alessandra Pereira; Santos,Rodrigo Furtado dos; Simpson,Charles E.; Valls,José Francisco Montenegro; Vello,Natal Antonio.
Peanut (Arachis hypogaea) is the fifth most produced oil crop worldwide. Besides lack of water, fungal diseases are the most limiting factors for the crop. Several species of Arachis are resistant to certain pests and diseases. This study aimed to successfully cross the A-genome with B-K-A genome wild species previously selected for fungal disease resistance, but that are still untested. We also aimed to polyplodize the amphihaploid chromosomes; cross the synthetic amphidiploids and A. hypogaea to introgress disease resistance genes into the cultivated peanut; and analyze pollen viability and morphological descriptors for all progenies and their parents. We selected 12 A-genome accessions as male parents and three B-genome species, one K-genome species,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Peanut; Interspecific hybrids; Polyploidization; Colchicine; Pollen viability.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300353
Imagem não selecionada

Imprime registro no formato completo
Variabilidade genetica em Avena sativa, Avena sterilis e em seus hibridos, por meio de avaliacoes agronomicas. Repositório Alice
SERENO, M.J.C. de M.; ZANETTINI, M.H.B.; CARVALHO, F.I.F. de; BARBOSA NETO, J.F..
Este trabalho teve como objetivo comparar a variabilidade genetica existente no grupo de aveia cultivado e na introducao silvestre desse cereal. O trabalho abrangeu a analise de caracteres agronomicos no campo (estatura, numero de antecios primarios e secundarios da panicula principal, numero de dias para o florescimento, numero de graos da panicula principal, peso de 1000 graos e numero de afilhos), em diferentes genotipos do grupo cultivado (UFRGS 7, UFRGS 8 e UPF 7) e do grupo selvagem (I-303, I-320, I-325, I-377, I-378, I-428 e I-ARG). Foi obtida diferenca estatistica em todos os caracteres tetados, com excecao do numero de afilhos ferteis; foi constatada maior variabilidade genetica interespecifica do que intraespecifica. A acao da selecao natural em...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Aveia; Hibridos interespecificos; Estatura de planta; Ciclo; Caracteres da panicula; Oats; Interspecific hybrids; Plant stature; Head date; Panicle traits.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/100250
Imagem não selecionada

Imprime registro no formato completo
利用DNA分子標識確認落花生種間雜交種(4x × 2x)基因組組成與外表型變異間之予盾性 Taiwan Agricultural Research Institute
黃惠娟; 林順福; 謝兆樞; Huey-Jiuan Huang; Shun-Fu Lin; Jaw-Shu Hsieh.
[[abstract]]本研究利用RAPD及SSR分子標識來分析落花生不同倍數性種間雜種(4x×2x)的多型性產生之頻率,並探討不同倍數性之種間親本對後代DNA多型性之貢獻是否有差異存在。試驗結果顯示,使用水稻或玉米的Intra-SSR引子可由PCR增幅落花生基因組約11個DNA片段,而Inter-SSR則可由PCR增幅約7個落花生DNA片段。Intra-SSR及Inter-SSR單一引子產生親本多型性之比率,平均分別為45.4%及45.1%高於RAPD的41.6 %。而Intra-SSR及Inter-SSR產生各個條帶之多型性比率分別為34.2%及36.0%,亦高於RAPD的33.6%。而不論是RAPD或SSR的分析,可發現F1的DNA條帶形式與栽培種母本相近,且其多型性條帶平均有66.8%是來自母本,只有33.2%的條帶是來自野生種父本,此種結果與基因組來源及貢獻量相符,但是卻與種間雜交種之外表型變異傾向於野生種之結果不合。因此,本試驗由分子層次確認支持基因組大小與植株外表型變異之不一致性。建議本試驗結果,可提供作物基因組及基因表現研究與種間雜交利用於品種改良之參考。
Palavras-chave: 落花生 種間雜交種 分子標識 Peanut (Arachis hypogaea); Interspecific hybrids; Molecular marker [[classification]]6.
Ano: 2001
Registros recuperados: 20
Primeira ... 1 ... 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