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| Registros recuperados: 144 | |
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| Degremont, Lionel; Garcia, Celine; Allen, Standish K., Jr.. |
| Oyster species suffer from numerous disease outbreaks, often causing high mortality. Because the environment cannot be controlled, genetic improvement for disease resistance to pathogens is an attractive option to reduce their impact on oyster production. We review the literature on selective breeding programs for disease resistance in oyster species, and the impact of triploidy on such resistance. Significant response to selection to improve disease resistance was observed in all studies after two to four generations of selection for Haplosporidium nelsoni and Roseovarius crassostrea in Crassostrea virginica, OsHV-1 in Crassostrea gigas, and Martelia sydneyi in Saccostrea glomerata. Clearly, resistance in these cases was heritable, but most of the studies... |
| Tipo: Text |
Palavras-chave: Disease resistance; Oyster; Selection; Pathogen; Genetic; Mortality. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00269/38049/36139.pdf |
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| Santos,Amaury S.; Bressan-Smith,Ricardo E.; Pereira,Messias G.; Rodrigues,Rosana; Ferreira,Claudia F.. |
| Common bean (Phaseolus vulgaris) cultivars with a high degree of resistance to Xanthomonas axonopodis pv. phaseoli (Xap) are not available in Brazil. Despite many studies, a low degree of resistance to Xap continues to exist due to its complex genetic inheritance, which is not well known. The objectives of this research were to complement a common bean genetic map based on the cross between a susceptible genotype 'HAB-52' and a resistant genotype 'BAC-6', and to map and analyze genomic regions (quantitative trait loci – QTLs) related to Xap resistance. Eleven linkage groups were determined using 143 RAPD markers, covering 1,234.5 cM of the genome. This map was used to detect QTLs associated with Xap resistance on leaves and pods. The averages of disease... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Common bean; Quantitative trait loci; Common bacterial blight; Disease resistance. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582003000100001 |
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| Leite,Regina Maria Villas Bôas de Campos; Oliveira,Maria Cristina Neves de. |
| Abstract:The objective of this work was to evaluate the suitability of the multivariate method of principal component analysis (PCA) using the GGE biplot software for grouping sunflower genotypes for their reaction to Alternaria leaf spot disease (Alternariaster helianthi), and for their yield and oil content. Sixty-nine genotypes were evaluated for disease severity in the field, at the R3 growth stage, in seven growing seasons, in Londrina, in the state of Paraná, Brazil, using a diagrammatic scale developed for this disease. Yield and oil content were also evaluated. Data were standardized using the software Statistica, and GGE biplot was used for PCA and graphical display of data. The first two principal components explained 77.9% of the total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternariaster helianthi; Helianthus annuus; Disease resistance; Principal component analysis. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000800649 |
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| Nogueira,Danilo Gustavo; Carvalho,Regis de Castro; Maluf,Wilson Roberto; Nogueira,Douglas Willian; Ticona-Benavente,César Augusto. |
| ABSTRACT The aim of this study was to develop bell pepper hybrids with resistance to multiple pathogens and make inferences in regard to components of heterosis in hybrids obtained from lines presumed to be resistant to Pepper yellow mosaic virus (PepYMV), Phytophthora capsici, or Meloidogyne incognita. The studies were carried out in a greenhouse. We used ten lines, thirty experimental hybrids, and seven controls (Konan-R, Magali-R, Martha-R, Stephany, Mallorca, Magnata Super, and Criollo de Morelos-334). For all experiments, a randomized block design was used with three replications (with plots composed of 16 plants). For evaluation of the reactions to P. capsici and to PepYMV, the percentages of asymptomatic plants were considered. For evaluation of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum annuum; Disease resistance; Plant breeding. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100093 |
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| SARTORATO,ALOISIO. |
| Due to the increased importance of angular leaf spot of common bean (Phaseolus vulgaris) in Brazil, monitoring the pathogenic variability of its causal agent (Phaeoisariopsis griseola) is the best strategy for a breeding program aimed at developing resistant genotypes. Fifty one isolates of P. griseola collected in five Brazilian States were tested on a set of 12 international differential cultivars in the greenhouse. When inoculated plants showed symptoms but no sporulation was observed, they were transferred to a moist chamber for approximately 20-24 h. After this period of time, if no sporulation was observed, the plants were considered resistant; otherwise, they were considered susceptible. From the fifty-one tested isolates, seven different pathotypes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Common bean; Angular leaf spot; Physiologic races; Disease resistance. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000100012 |
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| SOUZA, P. I. M. de; MOREIRA, C. T.; FARIAS NETO, A. L. de; SILVA, S. A. da ALMEIDA, L. A.; SILVA, J. F. V.; YORINORI, J. T.; NUNES JÚNIOR, J.; MONTEIRO, P. M. F. O.; ASSUNÇÃO, M. S.; ARANTES, N. E.. |
| ABSTRACT: The soybean cultivar BRS Raimunda is a result a Group Work formed by researcher of Embrapa Cerardos in conjunction with Embrapa Soja, with significant finantial support of Cerrados Fundation. In term of genealogy BRS Raimunda originated of a cross between Braxton X BR93-31857 and it was developed by modified genealogical and method of plant breeding. In the final research tests for variety release to the farms, the cultivars BRS Raimunda was superior in terms of grain production than the cultivars tests such as M-SOY 8800, DM 339 and Uirapuru. BRS Raimunda is a late cultivar indicated to the Cerrado Biome of Goias State and Federal District. Besides the high productivity and stability, the cultivar presents also resistence to the root-knot such... |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: BRS Raimunda; Melhoramento genético; Brasil; Plant galls; Plant diseases.; Cerrado; Doença de Planta; Galha; Glycine Max; Nematóide; Soja; Variedade Resistente.; Nematoda; Brazil; Disease resistance; Plant breeding; Soybeans.. |
| Ano: 2003 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/555740 |
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| Pereira,Mônica Juliani Zavaglia; Ramalho,Magno Antonio Patto; Abreu,Ângela de Fátima Barbosa. |
| Aiming to obtain information concerning the genetic control of the resistance of the bean (Phaseolus vulgaris L.) to the fungus Fusarium oxysporum f. sp. phaseoli, six crosses involving three resistant lines (Carioca MG, Esal 583 and Esal 566) and four susceptible to the fungus (Carioca, CNFC 10443, Uirapuru and Esal 522) were developed. The parental lines, the controls (Carioca MG and Carioca) and the F1, F2 and F3 generations were evaluated for reaction to Fusarium. For inoculation, root cuttings were immersed in a spore suspension. The evaluations were performed at 21 days after inoculation, by scale of notes ranging from 1.0, to 9.0 and genetic and phenotypic parameters were estimated. The heritability in the narrow sense ranged from 0.34 to 0.42 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris; Fusarium wild; Disease resistance. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000600010 |
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| COMASTRI FILHO, J. A.; POTT, A.. |
| A bovinocultura de corte, principal atividade economica da sub-regiao da Nhecolandia, do Pantanal, devido, principalmente, a problemas nutricionais, apresenta baixos indices de produtividade. A alimentacao dos bovinos e constituida de pastagens nativas, geralmente de produtividade ou valor nutritivo baixos e de baixa disponiblidade nos meses de cheia. Face a esta situacao, o CPA-Pantanal, entre 1980 e 1985, realizou um experimento de introducao e avaliacao da forrageira em area de "cordilheira" desmatada com o objetivo de identificar gramineas e leguminosas adaptaveis as suas condicoes ecologicas. As forrageiras (43 gramineas e 123 leguminosas) foram plantadas em parcelas de 1,5 x 3,0 m. Foram utilizadas duas parcelas, por local, para cada especie, uma com... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Planta graminea forrageira; Cordilheira; Resistencia a pragas; Resistencia a doencas; Tolerancia a seca; Plant; Grass; Pasture.; Gramínea; Leguminosa; Pastagem; Produção.; Pantanal; Forage; Disease resistance; Drought tolerance; Legumes; Pest resistance.. |
| Ano: 1996 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/789742 |
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| Registros recuperados: 144 | |
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