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| Registros recuperados : 69 | |
| 4. |  | FONSECA, I C.; PRADO, H. F. A. do; CECCON, G. Microbiota no solo em sucessões de outono-inverno e soja no verão. In: ENCONTRO NACIONAL DE PLANTIO DIRETO NA PALHA, 14., 2014, Bonito, MS. Sistema Plantio Direto: produzindo água e alimentando o mundo: resumos. Brasília, DF: Embrapa, 2014. Editores técnicos: Marie Luise Carolina Bartz, Júlio César Salton.| Biblioteca(s): Embrapa Agropecuária Oeste. |
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| 5. | | CECCON, G.; ROCHA, L. M. P.; FONSECA, I. C.; NETO, A. L. N.; SEREIA, R. C. Avaliação de cultivares de milho na safra 2009/2010, em Dourados, MS. In: CONGRESSO NACIONAL DE MILHO E SORGO, 28.; SIMPÓSIO BRASILEIRO SOBRE A LAGARTA DO CARTUCHO, 4., 2010, Goiânia. Potencialidades, desafios e sustentabilidade: resumos expandidos... Sete Lagoas: ABMS, 2010. 1 CD-ROM.| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 7. | | CECCON, G.; LUIZ NETO NETO, A.; FONSECA, I. C.; MATOSO, A. de O.; SEREIA, R. C. Híbridos de milho em consórcio com populações de Brachiaria ruziziensis na safra 2009/2010, em Dourados, MS In: CONGRESSO NACIONAL DE MILHO E SORGO, 28.; SIMPÓSIO BRASILEIRO SOBRE LAGARTA DO CARTUCHO, 4., 2010, Goiânia. Potencialidades, desafios e sustentabilidade: resumos expandidos. Goiânia: ABMS, 2010. 1 CD-ROM. Editado por: Paulo César Magalhães, Décio Karam, Fernando Simões Gielfi, Ivan Cruz. Trabalho também publicado no Livro de resumos.| Biblioteca(s): Embrapa Agropecuária Oeste. |
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| 8. | | CECCON, G.; PADILHA, N. de S.; FONSECA, I. C.; SEREIA, R. C.; NETO NETO, A. L. Evolução do consórcio milho-braquiária, em Dourados, Mato Grosso do Sul. In: SEMINÁRIO NACIONAL DE MILHO SAFRINHA, 11, 2011, Lucas do Rio Verde. De safrinha a grande safra: anais. Lucas do Rio Verde: Fundação Rio Verde: ABMS, 2011.| Biblioteca(s): Embrapa Agropecuária Oeste. |
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| 9. | | KATSUDA, M. S.; MIGLIORANZA, L. H. S.; FERREIRA, S. H. P.; FONSECA, I. C. B. Caracterização química, sensorial e de textura, de queijo tipo Prato com teor reduzido de gordura. Revista do Instituto de Laticínios Cândido Tostes, Juiz de Fora, v. 54, n. 309, p. 128-133, 1999. Edição dos Anais do 16o. Congresso Nacional de Laticínios, Juiz de Fora, agosto de 1999.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 10. | | CARNEIRO, C. E. A.; FIORETTO, R. A.; FONSECA, I. C. B.; CARNEIRO, G. E. de S. CALPOT, fosfato e silício co-aplicados ao solo para a cultura da soja. Semina: Ciências Agrárias, Londrina, v. 27, n.1, p. 5-12, jan./mar. 2006.| Biblioteca(s): Embrapa Soja. |
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| 11. | | FONSECA, I. C. de B.; KLAR, A. E.; GOTO, R.; VIEIRA, C. S.; NEVES, J. Colored polyethylene soil covers and grafting effects on cucumber flowering and yield. Scientia Agricola, Piracicaba, v. 60, n. 4, p. 643-649, Oct./Dec. 2003.| Biblioteca(s): Embrapa Hortaliças. |
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| 12. | | CECCON, G.; FONSECA, I. C.; LUIZ NETO NETO, A.; SEREIA, R. C.; LEITE, L. F. Estabelecimento de Brachiaria ruziziensis consorciada com milho resistente à Spodoptera frugiperda. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 29.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 13.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 11.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 8., 2010, Guarapari. Fontes de nutrientes e produção agrícola: modelando o futuro: anais. Viçosa, MG: SBCS, 2010. 1 CD-ROM. FERTBIO 2010.| Biblioteca(s): Embrapa Agropecuária Oeste. |
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| 15. | | LEITE, L. F.; FONSECA, I. C.; NETO NETO, A. L.; SEREIA, R. C.; CECCON, G. Levantamento produtivo das lavouras de milho safrinha do Mato Grosso do Sul, em 2010. In: SEMINÁRIO NACIONAL DE MILHO SAFRINHA, 11, 2011, Lucas do Rio Verde. De safrinha a grande safra: anais. Lucas do Rio Verde: Fundação Rio Verde: ABMS, 2011. 173-179| Biblioteca(s): Embrapa Agropecuária Oeste. |
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| 20. | | ALVES, V. B.; CECCON, G.; SEREIA, R. C.; FONSECA, I. C.; PADILHA, N. de S. Resistência do solo à penetração durante o cultivo da soja em sucessão a diferentes cultivos de outono-inverno. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 30.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 14.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 12.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 9.; SIMPÓSIO SOBRE SELÊNIO NO BRASIL, 1., 2012, Maceió. A responsabilidade socioambiental da pesquisa agrícola: anais. Viçosa: SBCS, 2012. Fertbio. Organizado por Leila Cruz da Silva, Gilson Moura Filho, Adriano Barboza Moura, Abel Washington de Albuquerque.| Biblioteca(s): Embrapa Agropecuária Oeste. |
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| Registros recuperados : 69 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Hortaliças. Para informações adicionais entre em contato com cnph.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Hortaliças. |
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Data corrente: |
30/10/2003 |
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Data da última atualização: |
30/10/2003 |
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Autoria: |
MELO, P. E. de. |
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Afiliação: |
Embrapa Hortaliças, Brasília, DF. |
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Título: |
The root systems of onion and Allium fistulosum in the context of organic farming: a breeding approach. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
2003. |
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Páginas: |
127 p. |
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Idioma: |
Inglês |
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Conteúdo: |
A massive amount of synthetic fertilizers is needed to grow onions (Allium cepa L.) due to their meager and inefficient root system. While the sustainability of such high-input systems is being questioned, low-input systems, such as organic agriculture, are gaining ground. For organic agriculture, plants have to be good nutrient scavengers. Therefore, productivity and stability of onion production in organic systems can be problematic. Plant breeding can improve the efficiency of onion roots, but breeding relies on available variation and there was no information about that in onions or in Allium. The aim of
this thesis was to search for variation in root morphology in onion and in its allied species A. fistulosum L., to understand the role this variation could play in organic agriculture and to perform a genetic analysis of root traits. The variation found in root traits in onion was limited, although old onion cultivars had a higher root length density than modern ones. Huge variation was observed between onion and A. fistulosum. A. fistulosum developed substantially more stem-borne and lateral roots and, consequently, a much denser root system. Experiments carried out in an organic farm revealed that onion explored a smaller volume of soil and had a lower root density than A. fistulosum. In addition, onion, contrary to A. fistulosum, showed a reduction in total and fine root density when cultivated in a soil with low nitrogen content. It was also demonstrated that A. fistulosum was very responsive to indigenous and inoculated AMF (50 to 60% increase in both shoot biomass and root length). A Quantitative Trait Locus (QTL) analysis was done on the genetic linkage map of the progeny from the cross A. cepa x (A. roylei x A. fistulosum) to locate some of the genes responsible for the better performance of the A. fistulosum root system. All traits were evaluated in a replicated trial using in vitro cloned plants. QTLs were found for
number of bulbs (1) and stem-borne roots (2) and, more interesting for breeding, for the number of lateral roots (1) and for the relative root length of fine and thick roots (1). The results showed the feasibility of breeding for onions with improved root systems using the interspecific hybrid between A. roylei and A. fistulosum as a genetic source. Some perspectives on the use of cultivars carrying such roots traits in onion organic production are highlighted. MenosA massive amount of synthetic fertilizers is needed to grow onions (Allium cepa L.) due to their meager and inefficient root system. While the sustainability of such high-input systems is being questioned, low-input systems, such as organic agriculture, are gaining ground. For organic agriculture, plants have to be good nutrient scavengers. Therefore, productivity and stability of onion production in organic systems can be problematic. Plant breeding can improve the efficiency of onion roots, but breeding relies on available variation and there was no information about that in onions or in Allium. The aim of
this thesis was to search for variation in root morphology in onion and in its allied species A. fistulosum L., to understand the role this variation could play in organic agriculture and to perform a genetic analysis of root traits. The variation found in root traits in onion was limited, although old onion cultivars had a higher root length density than modern ones. Huge variation was observed between onion and A. fistulosum. A. fistulosum developed substantially more stem-borne and lateral roots and, consequently, a much denser root system. Experiments carried out in an organic farm revealed that onion explored a smaller volume of soil and had a lower root density than A. fistulosum. In addition, onion, contrary to A. fistulosum, showed a reduction in total and fine root density when cultivated in a soil with low nitrogen content. It was also demonstrated that A. fist... Mostrar Tudo |
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Palavras-Chave: |
Cultivo orgânico; Variabilidade genética. |
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Thesagro: |
Agricultura Orgânica; Allium Cepa; Allium Fistulosum; Cebola; Cebolinha; Melhoramento; Raiz; Sistema Radicular. |
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Categoria do assunto: |
-- |
|
Marc: |
LEADER 03077nam a2200241 a 4500
001 1773916
005 2003-10-30
008 2003 bl uuuu m 00u1 u #d
100 1 $aMELO, P. E. de
245 $aThe root systems of onion and Allium fistulosum in the context of organic farming$ba breeding approach.
260 $a2003.$c2003
300 $a127 p.
520 $aA massive amount of synthetic fertilizers is needed to grow onions (Allium cepa L.) due to their meager and inefficient root system. While the sustainability of such high-input systems is being questioned, low-input systems, such as organic agriculture, are gaining ground. For organic agriculture, plants have to be good nutrient scavengers. Therefore, productivity and stability of onion production in organic systems can be problematic. Plant breeding can improve the efficiency of onion roots, but breeding relies on available variation and there was no information about that in onions or in Allium. The aim of this thesis was to search for variation in root morphology in onion and in its allied species A. fistulosum L., to understand the role this variation could play in organic agriculture and to perform a genetic analysis of root traits. The variation found in root traits in onion was limited, although old onion cultivars had a higher root length density than modern ones. Huge variation was observed between onion and A. fistulosum. A. fistulosum developed substantially more stem-borne and lateral roots and, consequently, a much denser root system. Experiments carried out in an organic farm revealed that onion explored a smaller volume of soil and had a lower root density than A. fistulosum. In addition, onion, contrary to A. fistulosum, showed a reduction in total and fine root density when cultivated in a soil with low nitrogen content. It was also demonstrated that A. fistulosum was very responsive to indigenous and inoculated AMF (50 to 60% increase in both shoot biomass and root length). A Quantitative Trait Locus (QTL) analysis was done on the genetic linkage map of the progeny from the cross A. cepa x (A. roylei x A. fistulosum) to locate some of the genes responsible for the better performance of the A. fistulosum root system. All traits were evaluated in a replicated trial using in vitro cloned plants. QTLs were found for number of bulbs (1) and stem-borne roots (2) and, more interesting for breeding, for the number of lateral roots (1) and for the relative root length of fine and thick roots (1). The results showed the feasibility of breeding for onions with improved root systems using the interspecific hybrid between A. roylei and A. fistulosum as a genetic source. Some perspectives on the use of cultivars carrying such roots traits in onion organic production are highlighted.
650 $aAgricultura Orgânica
650 $aAllium Cepa
650 $aAllium Fistulosum
650 $aCebola
650 $aCebolinha
650 $aMelhoramento
650 $aRaiz
650 $aSistema Radicular
653 $aCultivo orgânico
653 $aVariabilidade genética
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