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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
23/02/2018 |
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Data da última atualização: |
11/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALVES, G. F.; FIGUEIREDO, U. J. de; PANDOLFI FILHO, A. D.; BARRIOS, S. C. L.; VALLE, C. B. do. |
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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. |
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Título: |
Breeding strategies for Brachiaria spp. to improve productivity: an ongoing project. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Tropical Grassland - Forrajes Tropicales, v. 2, p. 1-3, 2014. |
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ISSN: |
2346-3775 |
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Idioma: |
Inglês |
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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 |
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Thesagro: |
Brachiaria; Produtividade. |
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Thesaurus Nal: |
Apomixis; Interspecific hybridization; Tropical pastures. |
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Categoria do assunto: |
-- |
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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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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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Biblioteca |
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Registro Completo
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
02/06/2005 |
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Data da última atualização: |
22/02/2016 |
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Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
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Autoria: |
MELLO, S. C. M. de; MELO, D. F.; ÁVILA, Z. R. de. |
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Título: |
Avaliação de pesticidas sobre o crescimento e esporulação de Dicyma pulvinata, agente de biocontrole de Microcyclus ulei. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2005. |
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Páginas: |
8 p. |
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Série: |
(Embrapa Recursos Genéticos e Biotecnologia. Comunicado técnico, 120). |
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Idioma: |
Português |
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Palavras-Chave: |
Dicyma pulvinata. |
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Thesagro: |
Controle Biológico; Microcyclus Ulei; Pesticida. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CENARGEN/25033/1/cot120.pdf
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Marc: |
LEADER 00702nam a2200193 a 4500
001 1185709
005 2016-02-22
008 2005 bl uuuu u0uu1 u #d
100 1 $aMELLO, S. C. M. de
245 $aAvaliação de pesticidas sobre o crescimento e esporulação de Dicyma pulvinata, agente de biocontrole de Microcyclus ulei.$h[electronic resource]
260 $aBrasília, DF: Embrapa Recursos Genéticos e Biotecnologia$c2005
300 $a8 p.
490 $a(Embrapa Recursos Genéticos e Biotecnologia. Comunicado técnico, 120).
650 $aControle Biológico
650 $aMicrocyclus Ulei
650 $aPesticida
653 $aDicyma pulvinata
700 1 $aMELO, D. F.
700 1 $aÁVILA, Z. R. de
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Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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