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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
07/11/2000 |
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Data da última atualização: |
08/06/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTOS, M. X. dos; POLLAK, L. M.; PACHECO, C. A. P.; GUIMARAES, P. E. O.; PETERNELLI, L. A.; PARENTONI, S. N.; NASS, L. L. |
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Afiliação: |
CLESO ANTONIO PATTO PACHECO, CNPMS; PAULO EVARISTO DE O GUIMARAES, CNPMS; SIDNEY NETTO PARENTONI, CNPMS. |
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Título: |
Incorporating different proportions of exotic maize germplasm into two adapted populations. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Genetics and Molecular Biology, Ribeirão Preto, v. 23, n. 2, p. 445-451, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
Maize breeders frequently wish to use exotic germplasm in their breeding programs without losing specific characteristics of their adapted material. The objective of this study was to determine the optimal proportions of exotic germplasm to incorporate into adapted populations (F2 = 50% exotic, BC1 = 25% exotic, BC2 = 12.5% exotic and BC3 = 6.25% exotic) to form the initial foundation population and to determine the heterosis between adapted x exotics. We used six exotic populations of different origins and two adapted populations representing a Brazilian heterotic pattern. In 1993-94 and 1994-95, the parents, F1, F2, BC1, BC2, BC3 and four checks were evaluated in six environments in central Brazil using an 8 x 9 simple rectangular lattice design. Higher mean values for yield were obtained as the proportions of exotic germplasm decreased. Some backcrosses produced more than the adapted populations BR 105 (7.59 ton/ha) and BR 106 (8.43 ton/ha). The best results were obtained when incorporating 6.25 or 12.5% of exotic genes. This trend was true for root lodging, stalk lodging and ear diseases but not for plant and ear height. The midparent heterosis for yield varied from - 16.1 to 40.3%. Midparent heterosis with positive and negative values were also found for the other traits. The results indicate the potential of exotic germplasm for developing good hybrids. After choosing the best exotic source, some recurrent selection might be appropriate in order to adapt and improve the exotic populations. MenosMaize breeders frequently wish to use exotic germplasm in their breeding programs without losing specific characteristics of their adapted material. The objective of this study was to determine the optimal proportions of exotic germplasm to incorporate into adapted populations (F2 = 50% exotic, BC1 = 25% exotic, BC2 = 12.5% exotic and BC3 = 6.25% exotic) to form the initial foundation population and to determine the heterosis between adapted x exotics. We used six exotic populations of different origins and two adapted populations representing a Brazilian heterotic pattern. In 1993-94 and 1994-95, the parents, F1, F2, BC1, BC2, BC3 and four checks were evaluated in six environments in central Brazil using an 8 x 9 simple rectangular lattice design. Higher mean values for yield were obtained as the proportions of exotic germplasm decreased. Some backcrosses produced more than the adapted populations BR 105 (7.59 ton/ha) and BR 106 (8.43 ton/ha). The best results were obtained when incorporating 6.25 or 12.5% of exotic genes. This trend was true for root lodging, stalk lodging and ear diseases but not for plant and ear height. The midparent heterosis for yield varied from - 16.1 to 40.3%. Midparent heterosis with positive and negative values were also found for the other traits. The results indicate the potential of exotic germplasm for developing good hybrids. After choosing the best exotic source, some recurrent selection might be appropriate in order to adapt and improve th... Mostrar Tudo |
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Palavras-Chave: |
Exotic; Exotico; Maize. |
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Thesagro: |
Germoplasma; Melhoramento; Milho; Zea Mays. |
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Thesaurus Nal: |
breeding; germplasm. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/32712/1/Incorporating-different.pdf
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Marc: |
LEADER 02360naa a2200301 a 4500
001 1484395
005 2018-06-08
008 2000 bl uuuu u00u1 u #d
100 1 $aSANTOS, M. X. dos
245 $aIncorporating different proportions of exotic maize germplasm into two adapted populations.$h[electronic resource]
260 $c2000
520 $aMaize breeders frequently wish to use exotic germplasm in their breeding programs without losing specific characteristics of their adapted material. The objective of this study was to determine the optimal proportions of exotic germplasm to incorporate into adapted populations (F2 = 50% exotic, BC1 = 25% exotic, BC2 = 12.5% exotic and BC3 = 6.25% exotic) to form the initial foundation population and to determine the heterosis between adapted x exotics. We used six exotic populations of different origins and two adapted populations representing a Brazilian heterotic pattern. In 1993-94 and 1994-95, the parents, F1, F2, BC1, BC2, BC3 and four checks were evaluated in six environments in central Brazil using an 8 x 9 simple rectangular lattice design. Higher mean values for yield were obtained as the proportions of exotic germplasm decreased. Some backcrosses produced more than the adapted populations BR 105 (7.59 ton/ha) and BR 106 (8.43 ton/ha). The best results were obtained when incorporating 6.25 or 12.5% of exotic genes. This trend was true for root lodging, stalk lodging and ear diseases but not for plant and ear height. The midparent heterosis for yield varied from - 16.1 to 40.3%. Midparent heterosis with positive and negative values were also found for the other traits. The results indicate the potential of exotic germplasm for developing good hybrids. After choosing the best exotic source, some recurrent selection might be appropriate in order to adapt and improve the exotic populations.
650 $abreeding
650 $agermplasm
650 $aGermoplasma
650 $aMelhoramento
650 $aMilho
650 $aZea Mays
653 $aExotic
653 $aExotico
653 $aMaize
700 1 $aPOLLAK, L. M.
700 1 $aPACHECO, C. A. P.
700 1 $aGUIMARAES, P. E. O.
700 1 $aPETERNELLI, L. A.
700 1 $aPARENTONI, S. N.
700 1 $aNASS, L. L.
773 $tGenetics and Molecular Biology, Ribeirão Preto$gv. 23, n. 2, p. 445-451, 2000.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
06/03/2017 |
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Data da última atualização: |
15/02/2024 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
ARRUDA, R. L.; SOUSA, T. P. de; FILIPPI, M. C. C. de; CORTES, M. V. de C. B.; CONCEIÇÃO, E. C. da. |
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Afiliação: |
REJANNE LIMA ARRUDA, pós-graduação UFG; THATYANE PEREIRA DE SOUSA, pós-graduação UFG; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; MARCIO VINICIUS DE C BARROS CORTES, CNPAF; EDEMILSON CARDOSO DA CONCEIÇÃO, pós-graduação UFG. |
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Título: |
Utilização de extrato vegetal de Ruta graveolens L. no controle de Magnaporthe oryzae. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: SEMINÁRIO JOVENS TALENTOS, 10., 2016, Santo Antônio de Goiás. Coletânea dos resumos apresentados. Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2016. |
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Páginas: |
p. 74. |
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Série: |
(Embrapa Arroz e Feijão. Documentos, 311). |
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Idioma: |
Português |
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Conteúdo: |
O objetivo do trabalho foi avaliar a atividade antifúngica do extrato de R. graveolens e de suas frações no controle de M. oryzae. A parte aérea de R. graveolens foi triturada, utilizando um moinho de facas, e o extrato foi obtido através do método de extração por percolação, utilizando uma solução hidroalcoólica 80% (v/v). |
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Thesagro: |
Arroz; Arruda; Brusone; Oryza sativa; Ruta graveolens. |
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Thesaurus NAL: |
Magnaporthe oryzae. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/157083/1/p74.pdf
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Marc: |
LEADER 01207nam a2200253 a 4500
001 2066136
005 2024-02-15
008 2016 bl uuuu u00u1 u #d
100 1 $aARRUDA, R. L.
245 $aUtilização de extrato vegetal de Ruta graveolens L. no controle de Magnaporthe oryzae.$h[electronic resource]
260 $aIn: SEMINÁRIO JOVENS TALENTOS, 10., 2016, Santo Antônio de Goiás. Coletânea dos resumos apresentados. Santo Antônio de Goiás: Embrapa Arroz e Feijão$c2016
300 $ap. 74.
490 $a(Embrapa Arroz e Feijão. Documentos, 311).
520 $aO objetivo do trabalho foi avaliar a atividade antifúngica do extrato de R. graveolens e de suas frações no controle de M. oryzae. A parte aérea de R. graveolens foi triturada, utilizando um moinho de facas, e o extrato foi obtido através do método de extração por percolação, utilizando uma solução hidroalcoólica 80% (v/v).
650 $aMagnaporthe oryzae
650 $aArroz
650 $aArruda
650 $aBrusone
650 $aOryza sativa
650 $aRuta graveolens
700 1 $aSOUSA, T. P. de
700 1 $aFILIPPI, M. C. C. de
700 1 $aCORTES, M. V. de C. B.
700 1 $aCONCEIÇÃO, E. C. da
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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