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Registro Completo |
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
08/01/2018 |
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Data da última atualização: |
08/01/2018 |
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Tipo da produção científica: |
Circular Técnica |
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Autoria: |
SCIVITTARO, W. B.; JARDIM, T. M.; GUEVARA, M. D. F.; MARTINAZZO, R.; KUNDE, R. J.; BARROS, L. M.; RODRIGUES, R. A.; SOUSA, R. O.; MONTEIRO, A. B.; STÖCKER, C. M. |
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Afiliação: |
WALKYRIA BUENO SCIVITTARO, CPACT; Thaís M. Jardim; Miguel D. F. Guevara; ROSANE MARTINAZZO, CPACT; Roberta J. Kunde; Lillian Medeiros Barros; Renata A. Rodrigues; Rogério O. de Sousa; Alex B. Monteiro; Cristiane M. Stöcker. |
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Título: |
Dinâmica de Carbono e Fluxos de Gases de Efeito Estufa em Sistemas de Produção em Terras Baixas. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Pelotas: Embrapa Clima Temperado, 2017. |
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Páginas: |
19 p. |
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Série: |
(Embrapa Clima Temperado Circular Técnica, 184). |
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Idioma: |
Português |
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Thesagro: |
Efeito Estufa. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/170506/1/Circular-184.pdf
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Marc: |
LEADER 00748nam a2200241 a 4500
001 2084492
005 2018-01-08
008 2017 bl uuuu u0uu1 u #d
100 1 $aSCIVITTARO, W. B.
245 $aDinâmica de Carbono e Fluxos de Gases de Efeito Estufa em Sistemas de Produção em Terras Baixas.$h[electronic resource]
260 $aPelotas: Embrapa Clima Temperado$c2017
300 $a19 p.
490 $a(Embrapa Clima Temperado Circular Técnica, 184).
650 $aEfeito Estufa
700 1 $aJARDIM, T. M.
700 1 $aGUEVARA, M. D. F.
700 1 $aMARTINAZZO, R.
700 1 $aKUNDE, R. J.
700 1 $aBARROS, L. M.
700 1 $aRODRIGUES, R. A.
700 1 $aSOUSA, R. O.
700 1 $aMONTEIRO, A. B.
700 1 $aSTÖCKER, C. M.
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Registro original: |
Embrapa Clima Temperado (CPACT) |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
05/09/2006 |
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Data da última atualização: |
02/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CORDEIRO, A. C. C.; SOARES, A. A.; RAMALHO, M. A. P.; RANGEL, P. H. N. |
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Afiliação: |
ANTONIO CARLOS CENTENO CORDEIRO, CPAF-RR; ANTONIO ALVES SOARES, UFLA; MAGNO ANTONIO PATTO RAMALHO, UFLA; PAULO HIDEO NAKANO RANGEL, CNPAF. |
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Título: |
Effect of the number of intercrosses on grain yield in basic rice synthetic populations. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Euphytica, v. 132, p. 79-86, 2003. |
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DOI: |
https://doi.org/10.1023/A:1024640202353 |
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Idioma: |
Inglês |
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Conteúdo: |
The effect of 0, 1, 2, 3 and 4 intercross cycles using genetic male sterility on the mean yield and genetic variability of the CNA 5 irrigated rice synthetic population was assessed studying 300 S0:2 (1998/99) and S0:3 (1999/00) families grown in two locations (Lambari, MG and Goianira, GO). Each intercross was investigated using a 8 × 8 triple lattice design experiment containing 60 families and four control cultivars. Five experiments were carried out per location and generation, totaling 20 experiments. Individual, combined over locations, combined over generations and combined over locations and generations analyses of variance were performed. Linear regression equations were fitted to data of each location and generation as well as, genetic and phenotypic parameters were estimated. An average increase of 3.91% in grain yield was obtained with the increase in the number of intercrosses. However, when genetic gains obtained from selection of the five and ten highest yielding families were considered, negative b estimates were always obtained, suggesting a tendency of gain increase reduction with the increase in the number of intercrosses. This was confirmed by the analysis of the means of the best families, since increases in the number of intercrosses did not result in selection of families with greater mean grain yield. The estimates of the genetic variances and heritabilities did not suggest an increase in genetic variability with the increase in intercross cycles. Therefore, carrying out intercrosses on the base population did not improve the results of the irrigated rice recurrent selection program. MenosThe effect of 0, 1, 2, 3 and 4 intercross cycles using genetic male sterility on the mean yield and genetic variability of the CNA 5 irrigated rice synthetic population was assessed studying 300 S0:2 (1998/99) and S0:3 (1999/00) families grown in two locations (Lambari, MG and Goianira, GO). Each intercross was investigated using a 8 × 8 triple lattice design experiment containing 60 families and four control cultivars. Five experiments were carried out per location and generation, totaling 20 experiments. Individual, combined over locations, combined over generations and combined over locations and generations analyses of variance were performed. Linear regression equations were fitted to data of each location and generation as well as, genetic and phenotypic parameters were estimated. An average increase of 3.91% in grain yield was obtained with the increase in the number of intercrosses. However, when genetic gains obtained from selection of the five and ten highest yielding families were considered, negative b estimates were always obtained, suggesting a tendency of gain increase reduction with the increase in the number of intercrosses. This was confirmed by the analysis of the means of the best families, since increases in the number of intercrosses did not result in selection of families with greater mean grain yield. The estimates of the genetic variances and heritabilities did not suggest an increase in genetic variability with the increase in intercross cycles. The... Mostrar Tudo |
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Palavras-Chave: |
Genetic gain; Genetic parameters; Intercrosses. |
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Thesagro: |
Arroz; Melhoramento Genético Vegetal; Oryza Sativa; Seleção Recorrente. |
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Thesaurus NAL: |
Recurrent selection; Rice. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02452naa a2200277 a 4500
001 1196016
005 2022-06-02
008 2003 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1023/A:1024640202353$2DOI
100 1 $aCORDEIRO, A. C. C.
245 $aEffect of the number of intercrosses on grain yield in basic rice synthetic populations.$h[electronic resource]
260 $c2003
520 $aThe effect of 0, 1, 2, 3 and 4 intercross cycles using genetic male sterility on the mean yield and genetic variability of the CNA 5 irrigated rice synthetic population was assessed studying 300 S0:2 (1998/99) and S0:3 (1999/00) families grown in two locations (Lambari, MG and Goianira, GO). Each intercross was investigated using a 8 × 8 triple lattice design experiment containing 60 families and four control cultivars. Five experiments were carried out per location and generation, totaling 20 experiments. Individual, combined over locations, combined over generations and combined over locations and generations analyses of variance were performed. Linear regression equations were fitted to data of each location and generation as well as, genetic and phenotypic parameters were estimated. An average increase of 3.91% in grain yield was obtained with the increase in the number of intercrosses. However, when genetic gains obtained from selection of the five and ten highest yielding families were considered, negative b estimates were always obtained, suggesting a tendency of gain increase reduction with the increase in the number of intercrosses. This was confirmed by the analysis of the means of the best families, since increases in the number of intercrosses did not result in selection of families with greater mean grain yield. The estimates of the genetic variances and heritabilities did not suggest an increase in genetic variability with the increase in intercross cycles. Therefore, carrying out intercrosses on the base population did not improve the results of the irrigated rice recurrent selection program.
650 $aRecurrent selection
650 $aRice
650 $aArroz
650 $aMelhoramento Genético Vegetal
650 $aOryza Sativa
650 $aSeleção Recorrente
653 $aGenetic gain
653 $aGenetic parameters
653 $aIntercrosses
700 1 $aSOARES, A. A.
700 1 $aRAMALHO, M. A. P.
700 1 $aRANGEL, P. H. N.
773 $tEuphytica$gv. 132, p. 79-86, 2003.
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Embrapa Arroz e Feijão (CNPAF) |
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