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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
28/12/2004 |
Data da última atualização: |
30/05/2018 |
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
Autoria: |
SCHAFFERT, R. E.; ALVES, V. M. C.; PITTA, G. V. E.; BAHIA, A. F. C.; SANTOS, F. G. |
Afiliação: |
ROBERT EUGENE SCHAFFERT, CNPMS; VERA MARIA CARVALHO ALVES, CNPMS. |
Título: |
Genetic variability in sorghum for P efficiency and responsiveness. |
Ano de publicação: |
2001 |
Fonte/Imprenta: |
In: HORST, W.J.; SCHENK, M.K.; BURKERT, A.; CLAASSEN, N.; FLESSA, H.; FROMMER, W.B.; GOLDBACH, H.; OLFS, H.-W.; ROMHELD, V.; SATTELMACHER, B.; SCHMIDHALTER, U.; SCHUBERT, S.; WIREN, N.V.; WITTENMAYER, L. (Ed.). Plant nutrition; food security and sustainability of agro-ecosystems through basic and applied research. Dordrecht: Kluwer Academic Publishers, 2001. p. 72-73. |
Idioma: |
Inglês |
Conteúdo: |
The complex of acidity in tropical soils includes low pH, toxic levels of Al, low availability associated with high adsorption of phosphorus (P), and a generalized low level of plant nutrients. This soil acidity complex often creates a chemical barrier to root growth and development, decreasing root contact with soil nutrients and water, resulting in even greater water and nutrient stress. The objective of this research was to identify genetic resources of sorghum both efficient and inefficient in P acquisition and responsive and non-responsive to applied P. Thirty six sorghum lines, 12 traditional lines representing both tolerance and susceptibility to Al toxicity and 24 lines derived from crosses between elite B-lines and a source of tolerance to Al toxicity, SC 283 (IS7173C), were evaluated for P acquisition efficiency on a Dark Red Dystrophic Latosolo under Cerrado vegetation at the National Maize and Sorghum Research Centre of Embrapa at Sete Lagoas, Minas Gerais, Brazil. The soil was limed to raise the pH to a range between 5.5 and 6.0. Two levels of soil phosphorus were used, 50% (5 ppm) and 100% (10 ppm) critical level with no additional P added in the second year. The 36 entries were classified into four groups; efficient and responsive to P (ER), non-efficient and responsive to P (NR), efficient and not responsive to P (EN), and non-efficient and not responsive to P (NN), according to their field performance for grain yield. Genetic variability for both P use efficiency and P responsiveness was identified within the set of 36 sorghum line representing both tolerance and susceptibility to Al toxicity. MenosThe complex of acidity in tropical soils includes low pH, toxic levels of Al, low availability associated with high adsorption of phosphorus (P), and a generalized low level of plant nutrients. This soil acidity complex often creates a chemical barrier to root growth and development, decreasing root contact with soil nutrients and water, resulting in even greater water and nutrient stress. The objective of this research was to identify genetic resources of sorghum both efficient and inefficient in P acquisition and responsive and non-responsive to applied P. Thirty six sorghum lines, 12 traditional lines representing both tolerance and susceptibility to Al toxicity and 24 lines derived from crosses between elite B-lines and a source of tolerance to Al toxicity, SC 283 (IS7173C), were evaluated for P acquisition efficiency on a Dark Red Dystrophic Latosolo under Cerrado vegetation at the National Maize and Sorghum Research Centre of Embrapa at Sete Lagoas, Minas Gerais, Brazil. The soil was limed to raise the pH to a range between 5.5 and 6.0. Two levels of soil phosphorus were used, 50% (5 ppm) and 100% (10 ppm) critical level with no additional P added in the second year. The 36 entries were classified into four groups; efficient and responsive to P (ER), non-efficient and responsive to P (NR), efficient and not responsive to P (EN), and non-efficient and not responsive to P (NN), according to their field performance for grain yield. Genetic variability for both P use effic... Mostrar Tudo |
Palavras-Chave: |
Susceptibility; Tolerância. |
Thesagro: |
Alumínio; Fertilizante Fosfatado; Fósforo; Variação Genética. |
Thesaurus Nal: |
soil pH; soil toxicity. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02690naa a2200265 a 4500 001 1488598 005 2018-05-30 008 2001 bl uuuu u00u1 u #d 100 1 $aSCHAFFERT, R. E. 245 $aGenetic variability in sorghum for P efficiency and responsiveness.$h[electronic resource] 260 $c2001 520 $aThe complex of acidity in tropical soils includes low pH, toxic levels of Al, low availability associated with high adsorption of phosphorus (P), and a generalized low level of plant nutrients. This soil acidity complex often creates a chemical barrier to root growth and development, decreasing root contact with soil nutrients and water, resulting in even greater water and nutrient stress. The objective of this research was to identify genetic resources of sorghum both efficient and inefficient in P acquisition and responsive and non-responsive to applied P. Thirty six sorghum lines, 12 traditional lines representing both tolerance and susceptibility to Al toxicity and 24 lines derived from crosses between elite B-lines and a source of tolerance to Al toxicity, SC 283 (IS7173C), were evaluated for P acquisition efficiency on a Dark Red Dystrophic Latosolo under Cerrado vegetation at the National Maize and Sorghum Research Centre of Embrapa at Sete Lagoas, Minas Gerais, Brazil. The soil was limed to raise the pH to a range between 5.5 and 6.0. Two levels of soil phosphorus were used, 50% (5 ppm) and 100% (10 ppm) critical level with no additional P added in the second year. The 36 entries were classified into four groups; efficient and responsive to P (ER), non-efficient and responsive to P (NR), efficient and not responsive to P (EN), and non-efficient and not responsive to P (NN), according to their field performance for grain yield. Genetic variability for both P use efficiency and P responsiveness was identified within the set of 36 sorghum line representing both tolerance and susceptibility to Al toxicity. 650 $asoil pH 650 $asoil toxicity 650 $aAlumínio 650 $aFertilizante Fosfatado 650 $aFósforo 650 $aVariação Genética 653 $aSusceptibility 653 $aTolerância 700 1 $aALVES, V. M. C. 700 1 $aPITTA, G. V. E. 700 1 $aBAHIA, A. F. C. 700 1 $aSANTOS, F. G. 773 $tIn: HORST, W.J.; SCHENK, M.K.; BURKERT, A.; CLAASSEN, N.; FLESSA, H.; FROMMER, W.B.; GOLDBACH, H.; OLFS, H.-W.; ROMHELD, V.; SATTELMACHER, B.; SCHMIDHALTER, U.; SCHUBERT, S.; WIREN, N.V.; WITTENMAYER, L. (Ed.). Plant nutrition; food security and sustainability of agro-ecosystems through basic and applied research. Dordrecht: Kluwer Academic Publishers, 2001. p. 72-73.
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