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Registro Completo |
Biblioteca(s): |
Embrapa Gado de Corte. |
Data corrente: |
23/02/2018 |
Data da última atualização: |
11/05/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
ALVES, G. F.; FIGUEIREDO, U. J. de; PANDOLFI FILHO, A. D.; BARRIOS, S. C. L.; VALLE, C. B. do. |
Afiliação: |
GEOVANI F. ALVES; ULISSES J. de FIGUEIREDO, Universidade Federal de Lavras; ANTÔNIO D. PANDOLFI FILHO, Universidade Federal do Espírito Santo; SANZIO CARVALHO LIMA BARRIOS, CNPGC; CACILDA BORGES DO VALLE, CNPGC. |
Título: |
Breeding strategies for Brachiaria spp. to improve productivity: an ongoing project. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Tropical Grassland - Forrajes Tropicales, v. 2, p. 1-3, 2014. |
ISSN: |
2346-3775 |
Idioma: |
Inglês |
Conteúdo: |
Two strategies have been used in the breeding of Brachiaria (syn. Urochloa) to produce new cultivars. The first involves exploring the natural variability exist-ing in nature, which is the selection of ecotypes, mostly apomicts, from the diversity in germplasm banks. This strategy proved efficient originally and the cultivars in use in Brazil were derived in this way, but progress with this strategy is limited in the medium to long term. The generation of novel variability through crossings is the alternative strategy to continue producing new improved varieties. This has been possible only through artificial chromosomal duplication of diploid and sexual B. ruziziensis and the fact that this species is cross-compatible with B. brizantha and B. decumbens, in Bra-zil the 2 most important species for tropical pastures. Crossings between species have been carried out at Embrapa Beef Cattle, Campo Grande, MS, Brazil, since 1988 (Valle et al. 1993, 2001; Valle 1997; Resende et al. 2007). The initial success in obtaining interspecific hy-brids in Brachiaria is indisputable and helped establish a practical methodology as well as allowed for the identi-fication of apomictic parents with good combining abil-ity. However, a comprehensive genetic improvement strategy to benefit from gains in quantitative characteris-tics associated with the majority of agronomic traits of economic interest in these species had not been started. Therefore, 3 methodologies are being used for this pur-pose: reciprocal recurrent selection; intra-population recurrent selection; and directed crosses between sexual and apomictic plants. The last 2 strategies are already underway and the strategies for agronomic evaluations are reported here. MenosTwo strategies have been used in the breeding of Brachiaria (syn. Urochloa) to produce new cultivars. The first involves exploring the natural variability exist-ing in nature, which is the selection of ecotypes, mostly apomicts, from the diversity in germplasm banks. This strategy proved efficient originally and the cultivars in use in Brazil were derived in this way, but progress with this strategy is limited in the medium to long term. The generation of novel variability through crossings is the alternative strategy to continue producing new improved varieties. This has been possible only through artificial chromosomal duplication of diploid and sexual B. ruziziensis and the fact that this species is cross-compatible with B. brizantha and B. decumbens, in Bra-zil the 2 most important species for tropical pastures. Crossings between species have been carried out at Embrapa Beef Cattle, Campo Grande, MS, Brazil, since 1988 (Valle et al. 1993, 2001; Valle 1997; Resende et al. 2007). The initial success in obtaining interspecific hy-brids in Brachiaria is indisputable and helped establish a practical methodology as well as allowed for the identi-fication of apomictic parents with good combining abil-ity. However, a comprehensive genetic improvement strategy to benefit from gains in quantitative characteris-tics associated with the majority of agronomic traits of economic interest in these species had not been started. Therefore, 3 methodologies are being used for this pur-pose... Mostrar Tudo |
Thesagro: |
Brachiaria; Produtividade. |
Thesaurus Nal: |
Apomixis; Interspecific hybridization; Tropical pastures. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02453naa a2200241 a 4500 001 2088118 005 2018-05-11 008 2014 bl uuuu u00u1 u #d 022 $a2346-3775 100 1 $aALVES, G. F. 245 $aBreeding strategies for Brachiaria spp. to improve productivity$ban ongoing project.$h[electronic resource] 260 $c2014 520 $aTwo strategies have been used in the breeding of Brachiaria (syn. Urochloa) to produce new cultivars. The first involves exploring the natural variability exist-ing in nature, which is the selection of ecotypes, mostly apomicts, from the diversity in germplasm banks. This strategy proved efficient originally and the cultivars in use in Brazil were derived in this way, but progress with this strategy is limited in the medium to long term. The generation of novel variability through crossings is the alternative strategy to continue producing new improved varieties. This has been possible only through artificial chromosomal duplication of diploid and sexual B. ruziziensis and the fact that this species is cross-compatible with B. brizantha and B. decumbens, in Bra-zil the 2 most important species for tropical pastures. Crossings between species have been carried out at Embrapa Beef Cattle, Campo Grande, MS, Brazil, since 1988 (Valle et al. 1993, 2001; Valle 1997; Resende et al. 2007). The initial success in obtaining interspecific hy-brids in Brachiaria is indisputable and helped establish a practical methodology as well as allowed for the identi-fication of apomictic parents with good combining abil-ity. However, a comprehensive genetic improvement strategy to benefit from gains in quantitative characteris-tics associated with the majority of agronomic traits of economic interest in these species had not been started. Therefore, 3 methodologies are being used for this pur-pose: reciprocal recurrent selection; intra-population recurrent selection; and directed crosses between sexual and apomictic plants. The last 2 strategies are already underway and the strategies for agronomic evaluations are reported here. 650 $aApomixis 650 $aInterspecific hybridization 650 $aTropical pastures 650 $aBrachiaria 650 $aProdutividade 700 1 $aFIGUEIREDO, U. J. de 700 1 $aPANDOLFI FILHO, A. D. 700 1 $aBARRIOS, S. C. L. 700 1 $aVALLE, C. B. do 773 $tTropical Grassland - Forrajes Tropicales$gv. 2, p. 1-3, 2014.
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Embrapa Gado de Corte (CNPGC) |
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Registros recuperados : 19 | |
6. | | RAGALZI, C. DE M.; RESENDE, R. M. S.; SILVA, A. S.; FIGUEIREDO, U. J. DE. Repetibilidade e número de cortes necessários para seleção de Brachiaria ruziziensis tetraploide. In: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 9., 2013, Campo Grande, MS. [Anais da..]. Campo Grande, MS: Embrapa Gado de Corte, 2013. (Embrapa Gado de Corte. Documentos, 204). Comissão organizadora: Denise Baptaglin Montagner, Grácia Maria Soares Rosinha, Rodrigo Carvalho Alva.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Gado de Corte. |
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7. | | BERCHEMBROCK, Y. V.; FIGUEIREDO, U. J. DE; VALLE, C. B. do; BARRIOS, S. C. L. Seleção de híbridos de Brachiaria humidicola em diferentes épocas. In: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 10., 2014, Campo Grande, MS. [Anais da..]. Campo Grande, MS: Embrapa Gado de Corte, 2014. p. 92-93. 2 p. (Embrapa Gado de Corte. Documentos, 208). Comissão organizadora: Grácia Maria Soares Rosinha, Alexandra Rocha de Oliveir, Rodrigo Carvalho Alva.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Gado de Corte. |
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8. | | FARIA, T. A. C.; MARTINS, L. B.; FIGUEIREDO, U. J. DE; BARRIOS, S. C. L.; VALLE, C. B. do. Avaliação de diferentes recipientes e tipos de plantio na produção de mudas de Brachiaria decumbens. In: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 9., 2013, Campo Grande, MS. [Anais da..]. Campo Grande, MS: Embrapa Gado de Corte, 2013. (Embrapa Gado de Corte. Documentos, 204). Comissão organizadora: Denise Baptaglin Montagner, Grácia Maria Soares Rosinha, Rodrigo Carvalho Alva.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Gado de Corte. |
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9. | | MARTINS, L. B.; BARRIOS, S. C. L.; VALLE, C. B. do; FIGUEIREDO, U. J. DE; FARIA, T. A. C. Avaliação da produção de sementes de híbridos de Brachiaria decumbens In: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 9., 2013, Campo Grande, MS. [Anais da..]. Campo Grande, MS: Embrapa Gado de Corte, 2013. (Embrapa Gado de Corte. Documentos, 204). Comissão organizadora: Denise Baptaglin Montagner, Grácia Maria Soares Rosinha, Rodrigo Carvalho AlvaTipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Gado de Corte. |
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11. | | FIGUEIREDO, U. J. de; VALLE, C. B. do; NUNES, J. A. R.; MENDONÇA, S. A.; EMATNÉ, H. J. Correlações entre caracteres morfológicos, físicos e químicos de híbridos de Brachiaria humidicola. In: CONGRESSO DE PÓS-GRADUAÇÃO DA UFLA, 19., 2010, Lavras, MG. Anais... Lavras: APG UFLA, 2010. 6 p.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Gado de Corte. |
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16. | | FIGUEIREDO, U. J. de; NUNES, J. A. R.; VALLE, C. B. do; BARRIOS, S. C. L.; ALVES, G. F. Simulação de pastejo na seleção para valor nutritivo no melhoramento de Brachiaria humidicola. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 49., 2012, Brasília. A produção animal no mundo em transformação: anais. Brasília, DF: SBZ, 2012. 3 p. 1 CD-ROM. Trabalho 4PDQ.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Gado de Corte. |
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17. | | SILVA, V. A.; MACHADO, J. L.; OLIVEIRA, A. L. de; FIGUEIREDO, U. J. de; CARVALHO, G. R.; FERRAO, M. A. G.; GUIMARÃES, R. J. Adaptability, stability, and genetic divergence of conilon coffee in Alto Suaçuí, Minas Gerais, Brazil. Crop Breeding and Applied Biotechnology, v. 17, n. 1, p. 25-31, Jan./Mar. 2017.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
Biblioteca(s): Embrapa Café. |
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18. | | FIGUEIREDO, U. J. de; BERCHEMBROCK, Y. V.; VALLE, C. B. do; BARRIOS, S. C. L.; QUESENBERRY, K. H.; MUÑOZ, P. R.; NUNES, J. A. R. Evaluating early selection in perennial tropical forages. Crop Breeding and Applied Biotechnology, v. 19, n. 3, p. 291-299, 2019.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
Biblioteca(s): Embrapa Gado de Corte. |
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19. | | FIGUEIREDO, U. J. de; NUNES, J. A. R.; PARRELLA, R. A. da C.; SOUZA, E. D.; SILVA, A. R. da; EMYGDIO, B. M.; MACHADO, J. R. A.; TARDIN, F. D. Adaptability and stability of genotypes of sweet sorghum by GGEBiplot and Toler methods. Genetics and Molecular Research, Ribeirão Preto, v. 14, n. 3, p. 11211-11221, 2015.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
Biblioteca(s): Embrapa Clima Temperado; Embrapa Milho e Sorgo; Embrapa Roraima. |
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Registros recuperados : 19 | |
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Nenhum registro encontrado para a expressão de busca informada. |
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