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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
20/08/2003 |
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Data da última atualização: |
25/08/2023 |
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Autoria: |
BÄNZIGER, M.; COOPER, M. |
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Título: |
Breeding for low input conditions and consequences for participatory plant breeding: examples from tropical maize and wheat. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Euphytica, v. 122, n. 3, p. 503-519, 2001. |
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Idioma: |
Inglês |
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Conteúdo: |
Participatory plant breeding (PPB) has been suggested as an effective alternative to formal plant breeding (FPB) as a breeding strategy for achieving productivity gains under low input conditions. With genetic progress through PPB and FPB being determined by 1he same genetic variables, the likelihood of success of PPB approaches applied in low input target conditions was analyzed using two case studies from FPB that have resulted in significant productivity gains under low input conditions: (I) breeding tropical maize for low input conditions by CIMMYT, and (2) breeding of spring wheat for the highly variable low input rainfed farming systems in Australia. In both cases, genetic improvement was an outcome of long-term investment in a sustained research effort aimed at understanding the detail of the important environmental constraints to productivity and the plant requirements for improved adaptation to the identified constraints. followed up by the design and continued evaluation of efficient breeding strategies. The breeding strategies used differed between the two case studies but were consistent in their attention to the key determinants of response to selection: (I) ensuring adequate sources of genetic variation and high selection pressures for the important traits at all stages of the breeding program, (2) use of experimental procedures to achieve high levels of heritability in the breeding trials. and (3) testing strategies that achieved a high genetic correlation between performance of germplasm in the breeding trials and under on-farm conditions. The implications of the outcomes from these FPB case studies for realizing the positive motivations for adopting PPB strategies are discussed with particular reference for low input target environment conditions. . MenosParticipatory plant breeding (PPB) has been suggested as an effective alternative to formal plant breeding (FPB) as a breeding strategy for achieving productivity gains under low input conditions. With genetic progress through PPB and FPB being determined by 1he same genetic variables, the likelihood of success of PPB approaches applied in low input target conditions was analyzed using two case studies from FPB that have resulted in significant productivity gains under low input conditions: (I) breeding tropical maize for low input conditions by CIMMYT, and (2) breeding of spring wheat for the highly variable low input rainfed farming systems in Australia. In both cases, genetic improvement was an outcome of long-term investment in a sustained research effort aimed at understanding the detail of the important environmental constraints to productivity and the plant requirements for improved adaptation to the identified constraints. followed up by the design and continued evaluation of efficient breeding strategies. The breeding strategies used differed between the two case studies but were consistent in their attention to the key determinants of response to selection: (I) ensuring adequate sources of genetic variation and high selection pressures for the important traits at all stages of the breeding program, (2) use of experimental procedures to achieve high levels of heritability in the breeding trials. and (3) testing strategies that achieved a high genetic correlation bet... Mostrar Tudo |
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Palavras-Chave: |
Interação genótipo x ambiente; Melhoramento de plantas. |
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Thesagro: |
Milho; Trigo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02369naa a2200181 a 4500
001 1529612
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100 1 $aBÄNZIGER, M.
245 $aBreeding for low input conditions and consequences for participatory plant breeding$bexamples from tropical maize and wheat.$h[electronic resource]
260 $c2001
520 $aParticipatory plant breeding (PPB) has been suggested as an effective alternative to formal plant breeding (FPB) as a breeding strategy for achieving productivity gains under low input conditions. With genetic progress through PPB and FPB being determined by 1he same genetic variables, the likelihood of success of PPB approaches applied in low input target conditions was analyzed using two case studies from FPB that have resulted in significant productivity gains under low input conditions: (I) breeding tropical maize for low input conditions by CIMMYT, and (2) breeding of spring wheat for the highly variable low input rainfed farming systems in Australia. In both cases, genetic improvement was an outcome of long-term investment in a sustained research effort aimed at understanding the detail of the important environmental constraints to productivity and the plant requirements for improved adaptation to the identified constraints. followed up by the design and continued evaluation of efficient breeding strategies. The breeding strategies used differed between the two case studies but were consistent in their attention to the key determinants of response to selection: (I) ensuring adequate sources of genetic variation and high selection pressures for the important traits at all stages of the breeding program, (2) use of experimental procedures to achieve high levels of heritability in the breeding trials. and (3) testing strategies that achieved a high genetic correlation between performance of germplasm in the breeding trials and under on-farm conditions. The implications of the outcomes from these FPB case studies for realizing the positive motivations for adopting PPB strategies are discussed with particular reference for low input target environment conditions. .
650 $aMilho
650 $aTrigo
653 $aInteração genótipo x ambiente
653 $aMelhoramento de plantas
700 1 $aCOOPER, M.
773 $tEuphytica$gv. 122, n. 3, p. 503-519, 2001.
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Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 32 | |
| 7. |  | COOPER, M.; CASTRO, S. S. de; COELHO, M. R. Micromorfologia do solo. In: TEIXEIRA, P. C.; DONAGEMMA, G. K.; FONTANA, A.; TEIXEIRA, W. G. (Ed.). Manual de métodos de análise de solo. 3. ed. rev. e ampl. Brasília, DF: Embrapa, 2017. pt. 5, cap. 1, p. 527-564.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Solos. |
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| 10. | | TSENG, C. L.; POSADAS, A. N. D.; VAZ, C. M. P.; COOPER, M.; CRESTANA, S. Abordagem multifractal 3D e microtomografia computadorizada de raios-x na avaliação de um solo submetido a diferentes tipos de manejo. In: SIMPÓSIO NACIONAL DE INSTRUMENTAÇÃO AGROPECUÁRIA, 4., 2019, São Carlos, SP. Ciência, inovação e mercado: anais. São Carlos, SP: Embrapa Instrumentação, 2019. Editores: Paulino Ribeiro Villas-Boas, Maria Alice Martins, Débora Marcondes Bastos Pereira Milori, Ladislau Martin Neto. SIAGRO 2019. 195-199| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| 16. | | SOUZA, Z. M. de; MARQUES JÚNIOR, J.; COOPER, M.; PEREIRA, G. T. Micromorfologia do solo e sua relação com atributos físicos e hídricos. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 41, n. 3, p. 487-492, mar. 2006 Título em inglês: Soil micromorphology and its relation with physical and hydrical attributes.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 17. | | BENEDETTI, M. M.; SPAROVEK, G.; COOPER, M.; CURI, N.; CARVALHO FILHO, A. de. Representatividade e potencial de utilização de um banco de dados de solos do Brasil. Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 32, n. 6, p. 2591-2600, nov/dez. 2008.| Tipo: Nota Técnica/Nota Científica |
| Biblioteca(s): Embrapa Solos. |
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| 18. | | MAFRA, A. L.; SILVA, E. F.; COOPER, M.; DEMATTE, J. L. I. Pedogenese de uma sequencia de solos desenvolvidos de arenito na regiao de Piracicaba, SP. Revista Brasileira de Ciencia do Solo, Vicosa, v.25, n.2, p.355-369, 2001.| Biblioteca(s): Embrapa Solos. |
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| 20. | | PESSOA, T. N.; COOPER, M.; NUNES, M. R.; UTEAU, D.; PETH, S.; VAZ, C. M. P.; LIBARDI, P. L. 2D and 3D techniques to assess the structure and porosity of Oxisols and their correlations with other soil properties. Catena, v. 210, 105899, 2022. 16 p.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 32 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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