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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
17/09/2018 |
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Data da última atualização: |
17/09/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BARROS, M. S.; MORAIS JÚNIOR, O. P.; MELO, P. G. S.; MORAIS, O. P.; CASTRO, A. P.; BRESEGHELLO, F. |
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Afiliação: |
MATHEUS S. BARROS, UFG; ODILON PEIXOTO MORAIS JUNIOR, UFG; PATRICIA G. S. MELO, UFG; ORLANDO PEIXOTO DE MORAIS, CNPAF; ADRIANO PEREIRA DE CASTRO, CNPAF; FLAVIO BRESEGHELLO, CNPAF. |
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Título: |
Effectiveness of early-generation testing applied to upland rice breeding. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Euphytica, v. 214, n. 4, article 61, Apr. 2018. |
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ISSN: |
1573-5060 |
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DOI: |
10.1007/s10681-018-2145-z |
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Idioma: |
Inglês |
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Conteúdo: |
A plant breeding program is a long-term investment. Therefore, periodic assessment of the effectiveness of a breeding strategy is essential to maximize genetic gains per unit of time and resource invested. In this work, we assessed the effectiveness of the early-generation testing (EGT) approach used in the upland rice (Oryza sativa L.) breeding program at Embrapa (Brazilian Agricultural Research Corporation), Brazil, estimating the genetic progress achieved for three traits in two distinct phases, spanning 15 years. In the first phase (from 2003 to 2010), it was used the bulk method within F3 progenies with prior testing of F2 crosses, while in the second phase (from 2010 to 2017), it was used the bulk method within F2 progenies. The dataset comprised 70 yield trials, involving 1884 F3:5 progenies (phase I) and 925 F2:4 progenies (phase II) from an elite population, and 10 check cultivars, evaluated for grain yield (GY), plant height (PH) and days to flowering (DTF). For estimating the genetic gain, we adapted a generalized linear regression method to compute bi-segmented linear regression coefficients. Desirable genetic gains were achieved only for GY in both phases of the breeding program, with 78.75 kg ha−1 year−1 (2.68%) in the first phase, and 53.78 kg ha−1 year−1 (1.54%) in the second phase. These results show the effectiveness of EGT, especially via bulk method within F3 progenies with prior testing of F2 crosses, applied to upland rice breeding. Some refinements are discussed in the method to make it more cost-effective and more efficient in achieving genetic gains. MenosA plant breeding program is a long-term investment. Therefore, periodic assessment of the effectiveness of a breeding strategy is essential to maximize genetic gains per unit of time and resource invested. In this work, we assessed the effectiveness of the early-generation testing (EGT) approach used in the upland rice (Oryza sativa L.) breeding program at Embrapa (Brazilian Agricultural Research Corporation), Brazil, estimating the genetic progress achieved for three traits in two distinct phases, spanning 15 years. In the first phase (from 2003 to 2010), it was used the bulk method within F3 progenies with prior testing of F2 crosses, while in the second phase (from 2010 to 2017), it was used the bulk method within F2 progenies. The dataset comprised 70 yield trials, involving 1884 F3:5 progenies (phase I) and 925 F2:4 progenies (phase II) from an elite population, and 10 check cultivars, evaluated for grain yield (GY), plant height (PH) and days to flowering (DTF). For estimating the genetic gain, we adapted a generalized linear regression method to compute bi-segmented linear regression coefficients. Desirable genetic gains were achieved only for GY in both phases of the breeding program, with 78.75 kg ha−1 year−1 (2.68%) in the first phase, and 53.78 kg ha−1 year−1 (1.54%) in the second phase. These results show the effectiveness of EGT, especially via bulk method within F3 progenies with prior testing of F2 crosses, applied to upland rice breedi... Mostrar Tudo |
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Palavras-Chave: |
Mixed-model analysis. |
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Thesagro: |
Arroz; Genética; Melhoramento Genético Vegetal; Oryza Sativa. |
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Thesaurus Nal: |
Breeding methods; Meta-analysis; Plant breeding; Quantitative genetics; Rice. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
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001 2095859
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008 2018 bl uuuu u00u1 u #d
022 $a1573-5060
024 7 $a10.1007/s10681-018-2145-z$2DOI
100 1 $aBARROS, M. S.
245 $aEffectiveness of early-generation testing applied to upland rice breeding.$h[electronic resource]
260 $c2018
520 $aA plant breeding program is a long-term investment. Therefore, periodic assessment of the effectiveness of a breeding strategy is essential to maximize genetic gains per unit of time and resource invested. In this work, we assessed the effectiveness of the early-generation testing (EGT) approach used in the upland rice (Oryza sativa L.) breeding program at Embrapa (Brazilian Agricultural Research Corporation), Brazil, estimating the genetic progress achieved for three traits in two distinct phases, spanning 15 years. In the first phase (from 2003 to 2010), it was used the bulk method within F3 progenies with prior testing of F2 crosses, while in the second phase (from 2010 to 2017), it was used the bulk method within F2 progenies. The dataset comprised 70 yield trials, involving 1884 F3:5 progenies (phase I) and 925 F2:4 progenies (phase II) from an elite population, and 10 check cultivars, evaluated for grain yield (GY), plant height (PH) and days to flowering (DTF). For estimating the genetic gain, we adapted a generalized linear regression method to compute bi-segmented linear regression coefficients. Desirable genetic gains were achieved only for GY in both phases of the breeding program, with 78.75 kg ha−1 year−1 (2.68%) in the first phase, and 53.78 kg ha−1 year−1 (1.54%) in the second phase. These results show the effectiveness of EGT, especially via bulk method within F3 progenies with prior testing of F2 crosses, applied to upland rice breeding. Some refinements are discussed in the method to make it more cost-effective and more efficient in achieving genetic gains.
650 $aBreeding methods
650 $aMeta-analysis
650 $aPlant breeding
650 $aQuantitative genetics
650 $aRice
650 $aArroz
650 $aGenética
650 $aMelhoramento Genético Vegetal
650 $aOryza Sativa
653 $aMixed-model analysis
700 1 $aMORAIS JÚNIOR, O. P.
700 1 $aMELO, P. G. S.
700 1 $aMORAIS, O. P.
700 1 $aCASTRO, A. P.
700 1 $aBRESEGHELLO, F.
773 $tEuphytica$gv. 214, n. 4, article 61, Apr. 2018.
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Embrapa Arroz e Feijão (CNPAF) |
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| Registros recuperados : 15 | |
| 12. |  | BRANCÃO, N.; NUNES, C. D. M.; GASTAL, M. F. da C.; RAUPP, A. A. A.; PORTO, M. P.; WENDT, W. Ocorrência de fungos em sementes de sorgo, milho, soja e trigo. Pelotas: Embrapa Clima Temperado, 2002. 3 p. (Embrapa Clima Temperado. Comunicado técnico, 76)| Biblioteca(s): Embrapa Clima Temperado. |
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| 14. | | RAUPP, A. A. A.; BRANCÃO, N.; VERNETTI JUNIOR, F. de J.; CHIELLE, Z. G.; GABE, N. L.; WINKLER, MARCHEZAN, E.; TELO, G. M. Avaliação de cultivares de sorgo granífero na safra de 2004/2005 do ensaio Sul-Rio-Grandense. Pelotas: Embrapa Clima Temperado, 2005. 8 p. (Embrapa Clima Temperado. Comunicado técnico, 122).| Tipo: Comunicado Técnico/Recomendações Técnicas |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 15. | | SILVA, J. C. da; MELO, R.; ALMEIDA, J. R.; CORREA, R.; RAUPP, A. A. A.; COELHO, R.; RODRIGUES, R. C.; BASANESI, J. C. Camalhões: uma opção para o problema de drenagem das Terras Baixas na região costeira da Lagoa Mirim, RS. Pelotas: Embrapa Clima Temperado, 2002. 36 p. (Embrapa Clima Temperado. Documentos, 95)| Biblioteca(s): Embrapa Clima Temperado. |
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| Registros recuperados : 15 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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