|
Registro Completo |
|
Biblioteca(s): |
Embrapa Arroz e Feijão. |
|
Data corrente: |
07/03/2006 |
|
Data da última atualização: |
20/03/2006 |
|
Autoria: |
MIRANDA, G. V.; GODOY, C. L.; GALVÃO, J. C. C.; SANTOS, I. C. dos; ECKERT, F. R.; SOUZA, L. V. de. |
|
Título: |
Selection of discrepant maize genotypes for nitrogen use efficiency by a chlorophyll meter. |
|
Ano de publicação: |
2005 |
|
Fonte/Imprenta: |
Crop Breeding and Applied Biotechnology, Viçosa, MG, v. 5, n. 4, p. 451-459, Dec. 2005. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The objective of the present study was to verify if it is possible to discriminate maize genotypes for their efficiency of nitrogen use by readings obtained with a portable chlorophyll meter. A total of 76 topcross hybrids and five previously tested controls were evaluated without sidedress nitrogen fertilization and 81 S1 families that only differed in relation to nitrogen sidedress fertilization (with and without). Readings were obtained by the chlorophyll meter in the phenological stages of four and eight fully unfolded leaves. Different negative selection pressures were simulated by the chlorophyll meter readings at each phenological stage and the genotypes were screened for grain yield and efficiency of N use. It was verified that the portable chlorophyll meter can be used to eliminate the least productive genotypes before flowering in quick tests, especially in environments without nitrogen sidedress, although the most effective genotypes regarding nitrogen use could not be discriminated this way.. |
|
Palavras-Chave: |
Estresse mineral; Medidor portátil de clorofila; Mineral stress; Portable chlorophyll meter; Zea mays L. |
|
Thesagro: |
Milho; Nitrogênio. |
|
Thesaurus Nal: |
nitrogen. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01838naa a2200277 a 4500
001 1213892
005 2006-03-20
008 2005 bl uuuu u00u1 u #d
100 1 $aMIRANDA, G. V.
245 $aSelection of discrepant maize genotypes for nitrogen use efficiency by a chlorophyll meter.
260 $c2005
520 $aThe objective of the present study was to verify if it is possible to discriminate maize genotypes for their efficiency of nitrogen use by readings obtained with a portable chlorophyll meter. A total of 76 topcross hybrids and five previously tested controls were evaluated without sidedress nitrogen fertilization and 81 S1 families that only differed in relation to nitrogen sidedress fertilization (with and without). Readings were obtained by the chlorophyll meter in the phenological stages of four and eight fully unfolded leaves. Different negative selection pressures were simulated by the chlorophyll meter readings at each phenological stage and the genotypes were screened for grain yield and efficiency of N use. It was verified that the portable chlorophyll meter can be used to eliminate the least productive genotypes before flowering in quick tests, especially in environments without nitrogen sidedress, although the most effective genotypes regarding nitrogen use could not be discriminated this way..
650 $anitrogen
650 $aMilho
650 $aNitrogênio
653 $aEstresse mineral
653 $aMedidor portátil de clorofila
653 $aMineral stress
653 $aPortable chlorophyll meter
653 $aZea mays L
700 1 $aGODOY, C. L.
700 1 $aGALVÃO, J. C. C.
700 1 $aSANTOS, I. C. dos
700 1 $aECKERT, F. R.
700 1 $aSOUZA, L. V. de
773 $tCrop Breeding and Applied Biotechnology, Viçosa, MG$gv. 5, n. 4, p. 451-459, Dec. 2005.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
|
