Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 173
Primeira ... 123456789 ... Última
Imagem não selecionada

Imprime registro no formato completo
Genetical basis of the plasticity of resource allocation in the Pacific oyster (Crassostrea gigas) ArchiMer
Ernande, Bruno; Haure, Joel; Degremont, Lionel; Bedier, Edouard; Boudry, Pierre.
Phenotypic and genetic correlations between fitness-related life-history traits - such as survival, growth and reproductive allocation - have to be considered to better understand selective processes, both in the wild and in breeding programs. Quantitative genetic experiments, based on nested half-sib mating designs, were perfomed in the Pacific oyster C. gigas (1) to estimate genetic variance and the response to selection and (2) to document phenotypic and genetic trade-offs between life history traits. Physiological trade-offs, i.e. plastcity of resource allocation, were shown to vary among genotypes. Genetic polymorphism was primarily observed for the the plasticity of reproductive effort. In addition, the degree of plasticity in reproductive effort...
Tipo: Text Palavras-chave: Genetic polymorphism; Genetic; Plasticity; Genetical basis; Crassostrea gigas; Pacific oysters.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/acte-3443.pdf
Imagem não selecionada

Imprime registro no formato completo
Genetical improvement of marine fish and shellfish : a french perspective ArchiMer
Boudry, Pierre; Chatain, Beatrice; Naciri-graven, Yamama; Lemaire, Christophe; Gerard, Andre.
In France, marine fish and shellfish farming is based mainly on the breeding of wild species, whose natural populations are traditionally exploited. Research programs are conducted by IFREMER, in co-operation with INRA and Universities. French research programs for the genetical improvement of marine fish and shellfish concern primarily seabass (Dicentrarchus labrax) and oysters (Ostrea edulis and Crassostrea gigas). The following programs are developed: •The knowledge of wild and farmed populations. The most recent prodjects involve the highly variable microsatellite markers. Seven markers are presently available for seabass and the work is now initiated on turbot (Scophthalmus maximus). In molluscs, microsatellite markers have been developed for the...
Tipo: Text Palavras-chave: Selection; Triploid; Shellfish; Fish; Genetic.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/1996/acte-3206.pdf
Imagem não selecionada

Imprime registro no formato completo
Genome mapping in shellfish aquaculture species ArchiMer
Lapegue, Sylvie.
The development of fish and shellfish farming is facing several challenges linked to the infancy of the industry: i.e. domestication, genetic improvement of disease resistance, genetic improvement of feed efficiency to fish meal and fish oil substitution by vegetal products, development of adapted vaccines, supply of fry or spat at high quality and high robustness, adaptation to environmental change, production of healthy, high quality consumer products and limitation of environmental impact of the activity and escapees. Over recent years, the EU and individual countries have supported the development of genomic tools for some aquaculture species (e.g. rainbow trout, sea bass, sea bream, turbot pacific oyster, Atlantic salmon). New perspectives arise...
Tipo: Text Palavras-chave: Mussels; Oysters; Domestication; Genome mapping; Genetic.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/acte-3819.pdf
Imagem não selecionada

Imprime registro no formato completo
Hemocyte characteristics in families of oysters, Crassostrea gigas, selected for differential survival during summer and reared in three sites ArchiMer
Lambert, Christophe; Soudant, Phillippe; Degremont, Lionel; Delaporte, Maryse; Moal, Jeanne; Boudry, Pierre; Jean, Frédéric; Huvet, Arnaud; Samain, Jean-francois.
High variability among individuals is often encountered when hemocyte characteristics are measured in bivalves. Such variability is suspected to result partly from genetic factors. In this study, hemocyte characteristics of six families of Crassostrea gigas were compared by flow cytometry at one sampling date in October 2001. These families were obtained from a nested, half-sibling cross design, and reared from July to October 2001 at three sites distributed along the French Atlantic coast from north to south: Baie des Veys (Normandy), Riviere d'Auray (Brittany) and Ronce (Marennes-oleron Basin, Poitou Charentes). Among the 15 measured hemocyte characteristics, production of reactive oxygen species (ROS) of untreated hemocytes (maintained in filtered...
Tipo: Text Palavras-chave: Genetic; Flow cytometry; Reactive oxygen species ROS; Adhesion; Hemocyte; Crassostrea gigas; Summer mortality.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3054.pdf
Imagem não selecionada

Imprime registro no formato completo
Herança da resistência de sorgo ao pulgão-verde, Schizaphis graminum (Rondani, 1852). Repositório Alice
CRUZ, I.; VENDRAMIM, J.D..
1988
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Sorgo; Pulgao verde; Resistencia; Planta; Genetica; Heranca; Sorghum bicolor; Schizaphis graminum; Greenbug; Genetic; Dominance; Insecta; Resistance; Plant.
Ano: 1988 URL: http://www.alice.cnptia.embrapa.br/handle/doc/478584
Imagem não selecionada

Imprime registro no formato completo
Herança da resistência de sorgo ao pulgão-verde Schizaphis graminum (Rondon.) (Homoptera: Aphididae). Repositório Alice
CRUZ, I.; VENDARAMIM, J.D..
Estudou-se a heranca da resistencia ao pulgao-verde do sorgo, Schizaphis graminum (Rond.) em populacoes derivadas do cruzamento envolvendo genotipos resistentes GR e GB 3. A partir deles, foram obtidas geracoes F1, F2 e retrocruzamentos, tanto com linhagens suscetiveis quanto com resistentes. Esses materiais foram semeados em caixa (36 x 80 x 10 cm). Em cada caixa, apos casualizacao, foram deixadas 20 plantulas, com execao da geracao segregante F2, para qual o numero foi 100. As avaliacoes foram baseadas numa escala visual de dano variando de zero (sem dano) a nove (acima de 80% de necrose nas folhas). Nas geracoes segregantes foram consideradas como plantas resistentes aquelas com notas de dano variando de zero a quatro. Para testar as hipoteses de...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Sorgo; Pulgao verde; Resistencia; Planta; Genetica; Heranca; Sorghum bicolor; Schizaphis graminum; Greenbug; Genetic; Dominance; Insecta; Resistance; Plant.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/477182
Imagem não selecionada

Imprime registro no formato completo
Holstein white coat color and performance: phenotypic, genetic and environmental correlations Braz. J. Genet.
Becerril,Carlos M.; Wilcox,Charles J.; Guerrero,Victor M..
Correlations of measures of percentages of white coat color, five measures of production and two measures of reproduction were obtained from 4293 first lactation Holsteins from eight Florida dairy farms. Percentages of white coat color were analyzed as recorded and transformed by an extension of Box-Cox procedures. Statistical analyses were by derivative-free restricted maximum likelihood (DFREML) with an animal model. Phenotypic and genetic correlations of white percentage (not transformed) were with milk yield, 0.047 and 0.097; fat yield, 0.002 and 0.004; fat percentage, -0.047 and -0.090; protein yield, 0.024 and 0.048; protein percentage, -0.070 and -0.116; days open, -0.012 and -0.065; and calving interval, -0.007 and -0.029. Changes in magnitude of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Holstein; Phenotypic; Genetic; Environmental.
Ano: 1996 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551996000400009
Imagem não selecionada

Imprime registro no formato completo
Hybridization and morphological differences between the two closely related oyster taxa Crassostrea angulata and C. gigas ArchiMer
Batista, Frederico; Fonseca, Vera; Ben-hamadou, Radhouan; Taris, Nicolas; Henriques, Maria; Boudry, Pierre.
Unlike in some crops, no large heterotic effects have been observed in most farmed animals. Interestingly, significant hybrid vigour for some traits has been reported in the Pacific oyster, Crassostrea gigas. Crossbreeding between closely related taxa can be seen as an efficient way to exploit the dominance component of the genetic variance of a trait. Factorial crosses between the Portuguese oyster C. angulata (from Sado estuary, Portugal) and C. gigas (from Seudre estuary, France) were done to evaluate the aquaculture potential of hybrids. Juveniles of the different progenies were reared in Ria Formosa (Portugal) under usual farming conditions. The genetic confirmation of all progenies was done using mitochondrial and nuclear markers in order to detect...
Tipo: Text Palavras-chave: Hybridization; Crassostrea angulata; Crassostrea gigas; Genetic; Oyster.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-3429.pdf
Imagem não selecionada

Imprime registro no formato completo
Identification of sources of resistance in sorghum to Peronosclerospora sorghi Trop. Plant Pathol.
Barbosa,Flavia C. R; Casela,Carlos R; Pfenning,Ludwig H; Santos,Fredolino G.
The main objective of this work was to identify sources of resistance in sorghum (Sorghum bicolor) to Peronosclerospora sorghi, the causal agent of downy mildew, through the evaluation of 42 sorghum genotypes under natural infection in the field. Genotypes were planted in single row plots between two rows of the susceptible line SC283, planted 30 days before, to act as spreader rows, in two separate nurseries. The experimental design was a completely randomized block design with three replications. Sorghum genotypes CMSXS156, CMSXS157, CMSXS243, TxARG-1, 8902, 9902054, 9910032, 9910296, Tx430, QL-3, SC170-6-17, CMSXS762 and BR304 were classified as highly resistant in both nurseries. Among these, SC170-6-17 and 9910296 showed 0% systemic infection. Results...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Sorghum bicolor; Diseases; Genetic; Resistance; Downy mildew.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000500010
Imagem não selecionada

Imprime registro no formato completo
Image analysis : a new method for estimating triploidy in commercial bivalves ArchiMer
Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Noiret, Christophe; Peudenier, Isabelle; Grizel, Henri.
For determination of ploidy levels in bivalves, three techniques are now routinely used: karyological determination. microfluorimetry and flow cytometry. This paper proposes an alternative technique which is based on determination of the optical density (OD) of stained nuclei using image analysis. A karyological and image analysis comparative experiment conducted on juveniles of Crassostrea gigas (Thunberg) and Ruditapes philippinarum (Adam & Reeve) is described and highlights the advantages of the image analysis technique. Initially developed on C. gigas and R. philippinarum, the image analysis method was easily extended to other bivalve species and to different developmental stages, as demonstrated by two experiments conducted on Ostrea edulis (L.)....
Tipo: Text Palavras-chave: Estimation bivalve triploidy; Image analysis; Triploid; Genetic; Crassostrea gigas; Oysters.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/publication-3200.pdf
Imagem não selecionada

Imprime registro no formato completo
Impact of atrazine on somatic aneuploidy in cupped oysters, Crassostrea gigas ArchiMer
Bouilly, Karine; Leitao, Alexandra; Mccombie, Helen; Chaves, R.; Guedes Pinto, H; Boudry, Pierre; Lapegue, Sylvie.
In the Pacific oyster, Crassostrea gigas hypodiploid aneuploid cells with 2n=19, 18 or 17 chromosomes have regularly been reported. There is a negative correlation between somatic aneuploidy and growth rate in oysters (Leitão et al., 2001a) as well as evidence for a genetic basis (Leitão et al., 2001b). Furthermore, non-random chromosome loss has been demonstrated in aneuploid karyotypes of C. gigas using the G-banding technique (Leitão et al., 2001c). This poster summarises different studies used to investigate the effects of the herbicide atrazine on the level of aneuploidy in this species
Tipo: Text Palavras-chave: Genetic; Aneuploidy; Toxicology; Impact; Atrazine; Crassostrea gigas; Pacific oysters.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/acte-3489.pdf
Imagem não selecionada

Imprime registro no formato completo
Impact of intensive larval rearing practices in oyster hatcheries : selective processes and loss of genetic variability (Poster) ArchiMer
Taris, Nicolas; Sauvage, Christopher; Boudry, Pierre.
Early-life history of oysters, like in most marine bivalves, is characterized by high fecundity and low survival rate. In hatcheries, which are ecoming more and more important for the production of juveniles for aquaculture production, rearing conditions are optimised (density, feeding, temperature...), and contrast with those observed in the wild. Additionally, slow growing larvae are culled by sieving.
Tipo: Text Palavras-chave: Crassostrea gigas; Juvenile; Genetic variability; Selection; Genetic; Hatcheries; Oyster.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/acte-3444.pdf
Imagem não selecionada

Imprime registro no formato completo
Impact of intensive larval rearing practices in oyster hatcheries : selective processes and loss of genetic variability (slides) ArchiMer
Taris, Nicolas; Sauvage, Christopher; Boudry, Pierre.
Oysters, like many marine bivalves, are characterized by very high fecundity and low survival rate at early stages of life. Rearing conditions in hatcheries (i.e. density, feeding, temperature...) are different from those observed in the wild. Additionally, slow growing larvae are culled by sieving. As previous studies have shown that genetic variability exists for several early development traits, we aimed to assess if common hatchery rearing practices exert specific selective processes at the larval stage. In order to avoid possible bias and to increase the number of families studied, we used a mixed-family approach with subsequent parentage analysis using a recently developed set of three multiplexed microsatellite markers. We studied the variance in...
Tipo: Text Palavras-chave: Hatcheries; Selection; Genetic drift; Genetic; Crassotrea gigas; Pacific oysters.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/acte-3483.pdf
Imagem não selecionada

Imprime registro no formato completo
Importancia da prolificidade no desempenho produtivo de um conjunto de linhagens de melancia no submedio Sao Francisco. Repositório Alice
QUEIROZ, M.A. de..
2001
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Melancia; Melhoramento genetico; Linhagem; Watermelons; Genetic; Plant breeding; Progeny.
Ano: 2001 URL: http://www.alice.cnptia.embrapa.br/handle/doc/134473
Imagem não selecionada

Imprime registro no formato completo
Importancia economica e melhoramento genetico da cebola no Nordeste do Brasil. Repositório Alice
COSTA, N. D.; CANDEIA, J.A.; ARAUJO, M. de T..
1999
Tipo: Capítulo em livro científico (ALICE) Palavras-chave: Cebola; Indicador economico; Melhoramento genetico; Allium cepa; Nordeste; Onions; Economic indicators; Plant breeding; Genetic; Northeast; Cebola; Melhoramento genético; Genetic improvement; Onion.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/handle/doc/133714
Imagem não selecionada

Imprime registro no formato completo
Induced triploidy in the European clam, Ruditapes decussatus (L.) and performance of triploid larvae ArchiMer
Gerard, Andre; Naciri, Yamama; Noiret, Christophe; Ledu, Christophe; Peignon, Jean-marie.
For the first time, effective treatments using cytochalasin B were developed to induce triploidy in the European clam, Ruditapes decussatus (L.). The percentage of triploid embrios was assessed by karyological or image analysis. Two treatments (O.5 or 1 mg of cytochasin B (CB per ml of dimethylsulfoxide in 1 l of sea water) were applied at different times after fertilization (10 to 25 mn), for two different periods (15 and 20 min). Best results were obtained for a CB concentration of 1 mg/l. When treatment was applied 15 min after fertilization for a 20 min period, 94% and 95% of triploid embryos were obtained in two repeated experiments. At metamorphosis, the treated larvae appeared to be no smaller than the control larvae in all experiments. Thowever, in...
Tipo: Text Palavras-chave: Genetic; Ruditapes decussatus; Clam; Induced triploidy.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/publication-3208.pdf
Imagem não selecionada

Imprime registro no formato completo
Initialism as a mechanism of weed interference: can a crop plant be blinded? Planta Daninha
Vidal,R.A.; Trezzi,M.M.; Kozlowski,L.A.; Prates,M.V.B.; Cieslik,L.F.; Merotto Jr.,A..
Initialism is a new word proposed to indicate the "shade-avoidance syndrome". Plants detect the presence of neighbor plants very early in the growing season through changes in light quality. They modify the allocation of photosynthesis products privileging shoot growth over the roots. One of the hypotheses of the authors is that, when weed management is timely scheduled, a "blind" crop could be more productive because it would avoid an imbalance on the shoot:root ratio (S:R). Two strategies were developed to test this hypothesis: a) to use the classical Yoda's Law to screen several crops for insensitivity to S:R imbalance; b) to evaluate several growth regulators to control the plant responses to crowding. Experimental results confirm that both strategies...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Initialism; Shade-avoidance syndrome; Genetic; Growth regulator.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000300002
Imagem não selecionada

Imprime registro no formato completo
Interacao genotipos x localidades em hibridos cripticos de milho S, x S, nas regioes Sudeste e Nordeste brasileiras. Repositório Alice
SANTOS, M. X. dos; ZINSLY, J. R.; VENCOVSKY, R.; VELLO, N. A..
Estudou-se a interacao genotipos x localidade em 104 hibridos cripticos de milho, na segunda geracao de intercruzamentos, em duas regioes brasileiras: Sudeste e Nordeste. Considerou-se o carater peso de sementes. A interacao genotipos x localidades foi de significativa, sendo o componente da interacao complexa extremamente grande, enquanto a interacao simples foi muito pequena. Valores relativamente baixos foram obtidos para as estimativas de coeficientes de correlacao intraclasse e correlacao genetica. Estimativa de ganhos esperados na selecao tambem evidenciaram a necessidade da selecao ser praticada no proprio local de utilizacao do material. Para a regiao Nordeste, foi sugerida a utilizacao dos tratamentos testados para obter populacoes de base...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Nordeste; Sudeste; Genetic; Hybrid; Northeast; Southeast; Genética; Genótipo; Hibrido; Melhoramento; Milho; Zea Mays; Corn; Genotype; Plant breeding.
Ano: 1981 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/133174
Imagem não selecionada

Imprime registro no formato completo
Investigações preliminares sobre a duplicação do número de cromosomios da seringueira pela ação da Colchicina. Repositório Alice
MENDES, L. O. T..
A colchicina na duplicação do número de cromosomios de plantas. Alterações morfológicas em plantas poliploides. O número de cromosomios do gênero Hevea. Técnica para a contagem de cromosomios em tecidos somáticos de Hevea. A aplicação da colchicina na duplicação do número de cromosomios da seringueira. Alterações morfológicas observadas no grupo de seedlings de seringueira (Hevea brasiliensis) tratados pela colchicina.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Seringueira; Cromossomo; Genética; Seleção; Colchicina; Hevea brasiliensis; Poliploide; Rubber tree; Chromosome; Genetic; Selection; Colchicine.
Ano: 1946 URL: http://www.alice.cnptia.embrapa.br/handle/doc/385966
Imagem não selecionada

Imprime registro no formato completo
Is the Portuguese oyster Crassostrea angulata in Southern Europe endangered by the expansion of the Pacific oyster C. gigas? ArchiMer
Batista, Frederico; Boudry, Pierre; Lapegue, Sylvie; Heurtebise, Serge; Monteiro, C. C..
The Portuguese oyster, Crassostrea angulata, was introduced from Portugal to the French Atlantic Coast in the 1860s. C. angulata quickly settled and expanded and leaded to the development of a new aquacultural industry in France. In the late 1960s, mortality associated with the detection of an iridovirus, led to the wipe out of C. angulata from French Atlantic waters and to the massive introduction of C. gigas to sustain production. In Southern Europe, similar symptoms were also observed in natural stocks of C. angulata from Sado River (Portugal) and from the area of Cadiz (Spain). Nowadays, only very few «pure» populations of C. angulata remain in southern Europe. These populations are potentially endangered by the current expansion of C. gigas...
Tipo: Text Palavras-chave: Selection; Hybridization; Settlement pattern; Population genetic; Genetic; Oysters; Crassostrea angulata; Crassostrea gigas.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/acte-3310.pdf
Registros recuperados: 173
Primeira ... 123456789 ... 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