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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
21/05/2009 |
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Data da última atualização: |
01/12/2010 |
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Autoria: |
OLIVEIRA, J. P. de; CHAVES, L. J.; DUARTE, J. B.; RIBEIRTO, K. de O.; BRASIL, E. M. |
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Afiliação: |
JAISON PEREIRA DE OLIVEIRA, UFG; LÁZARO JOSÉ CHAVES, UFG; JOÃO BATISTA DUARTE, UFG; KEYLA DE OLIVEIRA RIBEIRO, UFG; EDWARD MADUREIRA BRASIL, UFG. |
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Título: |
Heterosis for oil content in maize populations and hybrids of high quality protein. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Crop breeding and applied biotechnology, Londrina, v. 6, n. 2, p. 113-120, June 2006. |
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Idioma: |
Inglês |
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Conteúdo: |
This study aimed to evaluate QPM populations and their crosses for grain oil content to determine the heterosis and its components. Ninety-six-hybrids and their 21 parents were analyzed and separated in the groups dent and flint, in the partial diallelic/diallel intergroup scheme. The oil content was extracted from dry matter by the Soxlet method in three replicates for each genotypic material and attained mean values of 5.04g 100g-1 and 4.78g 100g-1, respectively, in the groups dent and flint. Among the hybrid crosses, CMS 456 x CMS 463 (6.84g 100g-1) presented the highest value. Although the average heterosis (-9.83%) indicates average dominance of the alleles for low oil content, combinations with positive total heterosis were observed. In this sense, the best populations under the focus of improvement for high oil content were ZQP 101 and ZQP 103, both of the dent group, and CMS52, CMS455c and CMS465 of the flint group. Hence, it was concluded that there is genetic variability and significant heterosis in the genotypes under study. |
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Palavras-Chave: |
Dialelo; Heterose; QPM; Qualidade nutricional; Teor de óleo. |
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Thesagro: |
Agricultura; Biotecnologia; Genética; Milho. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 01816naa a2200277 a 4500
001 1048958
005 2010-12-01
008 2006 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, J. P. de
245 $aHeterosis for oil content in maize populations and hybrids of high quality protein.
260 $c2006
520 $aThis study aimed to evaluate QPM populations and their crosses for grain oil content to determine the heterosis and its components. Ninety-six-hybrids and their 21 parents were analyzed and separated in the groups dent and flint, in the partial diallelic/diallel intergroup scheme. The oil content was extracted from dry matter by the Soxlet method in three replicates for each genotypic material and attained mean values of 5.04g 100g-1 and 4.78g 100g-1, respectively, in the groups dent and flint. Among the hybrid crosses, CMS 456 x CMS 463 (6.84g 100g-1) presented the highest value. Although the average heterosis (-9.83%) indicates average dominance of the alleles for low oil content, combinations with positive total heterosis were observed. In this sense, the best populations under the focus of improvement for high oil content were ZQP 101 and ZQP 103, both of the dent group, and CMS52, CMS455c and CMS465 of the flint group. Hence, it was concluded that there is genetic variability and significant heterosis in the genotypes under study.
650 $aAgricultura
650 $aBiotecnologia
650 $aGenética
650 $aMilho
653 $aDialelo
653 $aHeterose
653 $aQPM
653 $aQualidade nutricional
653 $aTeor de óleo
700 1 $aCHAVES, L. J.
700 1 $aDUARTE, J. B.
700 1 $aRIBEIRTO, K. de O.
700 1 $aBRASIL, E. M.
773 $tCrop breeding and applied biotechnology, Londrina$gv. 6, n. 2, p. 113-120, June 2006.
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
31/03/2009 |
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Data da última atualização: |
22/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
MCGRODDY, M. E.; SILVER, W. L.; OLIVEIRA JUNIOR, R. C. de; MELLO, W. Z. de; KELLER, M. |
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Afiliação: |
M. E. McGroddy, Department of Environmental Studies, Policy, and Management, University of California, Berkeley, California, USA; W. L. Silver, Department of Environmental Studies, Policy, and Management, University of California, Berkeley, California, USA; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; W. Z. de Mello, Instituto de Química, Departamento de Geoquímica, Universidade Federal Fluminense, Niteroi, Brazil; M. Keller, International Institute of Tropical Forestry, Forest Service, U.S. Department of Agriculture, San Juan, Puerto Rico, USA. |
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Título: |
Retention of phosphorus in highly weathered soils under a lowland Amazonian forest ecosystem. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Journal of geophysical Research, v. 113, n. G4, p. 1-11, Dec. 2008. |
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Idioma: |
Inglês |
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Conteúdo: |
The low available phosphorus (P) pools typical of highly weathered tropical forest soils are thought to result from a combination of export of phosphorus via erosion and leaching as well as chemical reactions resulting in physically and chemically protected P compounds. Despite the low apparent P availability, these soils support some of the highest terrestrial net primary productivity globally. We followed different P fractions after P additions to two soil types, sandy loam and sandy clay, over 1 year in a lowland Amazonian forest. Of all the soil P fractions measured, only the NaHCO3 and NaOH extractable fractions showed a significant increase following P additions, and this occurred only in sandy clays (+ 56.9 ± 15.1 kg ha-1 and + 2.8 ± 1.5 kg ha-1, respectively). Our results indicate that intermediate rather than recalcitrant pools are the dominant fate of added P over an annual timescale even in fine-textured soils. Fine root and forest floor P pools increased more in the sandy loams following P additions suggesting a larger biotic P sink in these soils. Leaching of inorganic P from the surface soils was an unexpected and significant fate of added P in both soil types (9 ± 3% in the sandy loams, 2 ± 1% in the sandy clays). Significantly more of the added P was retained in the sandy clay soils than in the sandy loams (69 ± 20% versus 33 ± 7%) over the 1-year period. |
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Palavras-Chave: |
Brasil. |
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Thesagro: |
Ecossistema; Fertilidade do Solo; Fósforo; Solo Florestal. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02107naa a2200241 a 4500
001 1410229
005 2022-11-22
008 2008 bl uuuu u00u1 u #d
100 1 $aMCGRODDY, M. E.
245 $aRetention of phosphorus in highly weathered soils under a lowland Amazonian forest ecosystem.$h[electronic resource]
260 $c2008
520 $aThe low available phosphorus (P) pools typical of highly weathered tropical forest soils are thought to result from a combination of export of phosphorus via erosion and leaching as well as chemical reactions resulting in physically and chemically protected P compounds. Despite the low apparent P availability, these soils support some of the highest terrestrial net primary productivity globally. We followed different P fractions after P additions to two soil types, sandy loam and sandy clay, over 1 year in a lowland Amazonian forest. Of all the soil P fractions measured, only the NaHCO3 and NaOH extractable fractions showed a significant increase following P additions, and this occurred only in sandy clays (+ 56.9 ± 15.1 kg ha-1 and + 2.8 ± 1.5 kg ha-1, respectively). Our results indicate that intermediate rather than recalcitrant pools are the dominant fate of added P over an annual timescale even in fine-textured soils. Fine root and forest floor P pools increased more in the sandy loams following P additions suggesting a larger biotic P sink in these soils. Leaching of inorganic P from the surface soils was an unexpected and significant fate of added P in both soil types (9 ± 3% in the sandy loams, 2 ± 1% in the sandy clays). Significantly more of the added P was retained in the sandy clay soils than in the sandy loams (69 ± 20% versus 33 ± 7%) over the 1-year period.
650 $aAmazonia
650 $aEcossistema
650 $aFertilidade do Solo
650 $aFósforo
650 $aSolo Florestal
653 $aBrasil
700 1 $aSILVER, W. L.
700 1 $aOLIVEIRA JUNIOR, R. C. de
700 1 $aMELLO, W. Z. de
700 1 $aKELLER, M.
773 $tJournal of geophysical Research$gv. 113, n. G4, p. 1-11, Dec. 2008.
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