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Registro Completo |
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Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
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Data corrente: |
03/12/2014 |
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Data da última atualização: |
03/12/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BELICUAS, P. R.; AGUIAR, A. M.; BENTO, D. A. V.; CAMARA, T. M. M.; SOUZA JUNIOR, C. L. de. |
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Afiliação: |
TASSIANO MAXWELL MARINHO CAMARA, CPATC. |
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Título: |
Inheritance of the stay-green trait in tropical maize. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Euphytica, Wageningen, Holanda, v. 196, n. 3,2014. |
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ISSN: |
0014-2336 |
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DOI: |
10.1007/s10681-014-1106-4 |
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Idioma: |
Português |
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Conteúdo: |
Stay-green maize genotypes have been associated with tolerance to biotic and abiotic stresses, including tolerance to drought, and to stalk and root lodging, but there is limited information on its inheritance. Thus, this research was conducted to study the inheritance of the stay-green trait using both conventional analysis and QTL mapping of the Design III in a tropical maize population developed from two inbred lines genetically divergent for this trait. Two-hundred and fifty F2 plants were genotyped with 177 microsatellite markers, and their backcrossed proge-nies to both parental inbreds were evaluated at three locations. Ten plants per plot were assessed 120 days after sowing and the plot means scores for stay-green, adjusted for days to silking emergence, were used for analysis. The additive variance was larger than the dominance variance, the genetic by location interaction variance presented a high magnitude, and the heritability coefficient on a plant-basis a low magnitude. Seventeen QTL were mapped, most of them were clustered on four chromosomes and accounted for by 73.08 % of the genetic variance. About half of the QTL interacted with location, and the average level of dominance was partial dominance. The additive effects were larger than the dominance effects; the latter were not unidirectional, so that heterosis could not be exploited in crosses. Procedures for marker-assisted selection to increase the level o fstay-green are discussed and an approach is suggested for using both stable and non-stable QTL in a marker-assisted backcross program. MenosStay-green maize genotypes have been associated with tolerance to biotic and abiotic stresses, including tolerance to drought, and to stalk and root lodging, but there is limited information on its inheritance. Thus, this research was conducted to study the inheritance of the stay-green trait using both conventional analysis and QTL mapping of the Design III in a tropical maize population developed from two inbred lines genetically divergent for this trait. Two-hundred and fifty F2 plants were genotyped with 177 microsatellite markers, and their backcrossed proge-nies to both parental inbreds were evaluated at three locations. Ten plants per plot were assessed 120 days after sowing and the plot means scores for stay-green, adjusted for days to silking emergence, were used for analysis. The additive variance was larger than the dominance variance, the genetic by location interaction variance presented a high magnitude, and the heritability coefficient on a plant-basis a low magnitude. Seventeen QTL were mapped, most of them were clustered on four chromosomes and accounted for by 73.08 % of the genetic variance. About half of the QTL interacted with location, and the average level of dominance was partial dominance. The additive effects were larger than the dominance effects; the latter were not unidirectional, so that heterosis could not be exploited in crosses. Procedures for marker-assisted selection to increase the level o fstay-green are discussed and an approach is sugge... Mostrar Tudo |
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Palavras-Chave: |
Maize. |
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Thesagro: |
Milho. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02188naa a2200217 a 4500
001 2001458
005 2014-12-03
008 2014 bl uuuu u00u1 u #d
022 $a0014-2336
024 7 $a10.1007/s10681-014-1106-4$2DOI
100 1 $aBELICUAS, P. R.
245 $aInheritance of the stay-green trait in tropical maize.$h[electronic resource]
260 $c2014
520 $aStay-green maize genotypes have been associated with tolerance to biotic and abiotic stresses, including tolerance to drought, and to stalk and root lodging, but there is limited information on its inheritance. Thus, this research was conducted to study the inheritance of the stay-green trait using both conventional analysis and QTL mapping of the Design III in a tropical maize population developed from two inbred lines genetically divergent for this trait. Two-hundred and fifty F2 plants were genotyped with 177 microsatellite markers, and their backcrossed proge-nies to both parental inbreds were evaluated at three locations. Ten plants per plot were assessed 120 days after sowing and the plot means scores for stay-green, adjusted for days to silking emergence, were used for analysis. The additive variance was larger than the dominance variance, the genetic by location interaction variance presented a high magnitude, and the heritability coefficient on a plant-basis a low magnitude. Seventeen QTL were mapped, most of them were clustered on four chromosomes and accounted for by 73.08 % of the genetic variance. About half of the QTL interacted with location, and the average level of dominance was partial dominance. The additive effects were larger than the dominance effects; the latter were not unidirectional, so that heterosis could not be exploited in crosses. Procedures for marker-assisted selection to increase the level o fstay-green are discussed and an approach is suggested for using both stable and non-stable QTL in a marker-assisted backcross program.
650 $aMilho
653 $aMaize
700 1 $aAGUIAR, A. M.
700 1 $aBENTO, D. A. V.
700 1 $aCAMARA, T. M. M.
700 1 $aSOUZA JUNIOR, C. L. de
773 $tEuphytica, Wageningen, Holanda$gv. 196, n. 3,2014.
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Embrapa Tabuleiros Costeiros (CPATC) |
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| Registros recuperados : 44 | |
| 14. |  | CEPEDA, M. C.; SOUZA JUNIOR, C. L. de; PANDEY, S.; LEON, L. N. Efeitos gênicos e oscilação genética associados a seleção recorrente intrapopulacional na população de milho SA3. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 8, p. 1585-93, ago. 2000. Título em inglês: Genic and genetic drift effects associated with intrapopulation recurrent selection in the SA3 maize population.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 16. | | RESENDE, M. D. V.; SOUZA JUNIOR, C. L.; SANTOS, M. X.; PACHECO, C. A. P. Respostas correlacionadas diretas e indiretas envolvendo cinco caracteres do milho (Zea mays L.) avaliados em solos sob cerrado e fertil. In: CONGRESSO NACIONAL DE MILHO E SORGO, 19.; REUNIAO TECNICA ANUAL DE MILHO, 37.; REUNIAO TECNICA ANUAL DO SORGO, 21., 1992, Porto Alegre. Resumos. Porto Alegre: SAA, 1992. p. 14.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 20. | | RESENDE, M. D. V.; SOUZA JUNIOR, C. L.; GAMA, E. E. G.; MAGNAVACA, R. Progressos genéticos diretos e indiretos envolvendo a seleção de genótipos de milho (Zea mays L.) em solos sob cerrado e fértil. In: CONGRESSO NACIONAL DE MILHO E SORGO, 19.; REUNIAO TECNICA ANUAL DE MILHO, 37.; REUNIAO TECNICA ANUAL DO SORGO, 21., 1992, Porto Alegre. Resumos. Porto Alegre: SAA, 1992. p. 13.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| Registros recuperados : 44 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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