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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
23/01/2006 |
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Data da última atualização: |
29/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NINAMANGO-CARDENAS, F. E.; GUIMARAES, C. T.; MARTINS, P. R.; PARENTONI, S. N.; CARNEIRO, N. P.; LOPES, M. A.; MORO, J. R.; PAIVA, E. |
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Afiliação: |
CLAUDIA TEIXEIRA GUIMARAES, CNPMS; SIDNEY NETTO PARENTONI, CNPMS; NEWTON PORTILHO CARNEIRO, CNPMS. |
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Título: |
Mapping QTLs for aluminum tolerance in maize. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Euphytica, Wageningen, v. 130, n. 2 p. 223-232, 2003. |
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Idioma: |
Inglês |
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Conteúdo: |
Aluminum toxicity is one of the major constraints for plant development in acid soils, limiting food production in many countries. Cultivars genetically adapted to acid soils may offer an environmental compatible solution, providing a sustainable agriculture system. The aim of this work was to identify genomic regions associated with Al tolerance in maize, and to quantify the genetic effects on the phenotypic variation. A population of 168 F3:4 families derived from a cross between two contrasting maize inbred lines for Al tolerance was evaluated using the NSRL and RSRL parameters in nutrient solution containing toxic level of aluminum. Variance analyses indicated that the NSRL was the most reliable phenotypic index to measure Al tolerance in the population, being used for further QTL mapping analysis. RFLP and SSR markers were selected for bulked segregant analysis, and additional SSR markers, flanking the polymorphisms of interest, were chosen in order to saturate the putative target regions. Seven linkage groups were constructed using 17 RFLP and 34 SSR markers. Five QTLs were mapped on chromosomes 2, 6 and 8, explaining 60% of the phenotypic variation. QTL4 and marker umc043 were located on chromosomes 8 and 5, close to genes encoding for enzymes involved in the organic acids synthesis pathways, a widely proposed mechanism for Al tolerance in plants. QTL2 was mapped in the same region as Alm2, also associated with Al tolerance in maize. In addition, dominant and additive effects were important in the control of this trait in maize.. MenosAluminum toxicity is one of the major constraints for plant development in acid soils, limiting food production in many countries. Cultivars genetically adapted to acid soils may offer an environmental compatible solution, providing a sustainable agriculture system. The aim of this work was to identify genomic regions associated with Al tolerance in maize, and to quantify the genetic effects on the phenotypic variation. A population of 168 F3:4 families derived from a cross between two contrasting maize inbred lines for Al tolerance was evaluated using the NSRL and RSRL parameters in nutrient solution containing toxic level of aluminum. Variance analyses indicated that the NSRL was the most reliable phenotypic index to measure Al tolerance in the population, being used for further QTL mapping analysis. RFLP and SSR markers were selected for bulked segregant analysis, and additional SSR markers, flanking the polymorphisms of interest, were chosen in order to saturate the putative target regions. Seven linkage groups were constructed using 17 RFLP and 34 SSR markers. Five QTLs were mapped on chromosomes 2, 6 and 8, explaining 60% of the phenotypic variation. QTL4 and marker umc043 were located on chromosomes 8 and 5, close to genes encoding for enzymes involved in the organic acids synthesis pathways, a widely proposed mechanism for Al tolerance in plants. QTL2 was mapped in the same region as Alm2, also associated with Al tolerance in maize. In addition, dominant and additive... Mostrar Tudo |
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Palavras-Chave: |
chromosomes-; Cromossomo; Mapeamento genético. |
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Thesagro: |
Alumínio; Genética; Marcador Genético; Milho. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02333naa a2200289 a 4500
001 1489128
005 2018-05-29
008 2003 bl uuuu u00u1 u #d
100 1 $aNINAMANGO-CARDENAS, F. E.
245 $aMapping QTLs for aluminum tolerance in maize.$h[electronic resource]
260 $c2003
520 $aAluminum toxicity is one of the major constraints for plant development in acid soils, limiting food production in many countries. Cultivars genetically adapted to acid soils may offer an environmental compatible solution, providing a sustainable agriculture system. The aim of this work was to identify genomic regions associated with Al tolerance in maize, and to quantify the genetic effects on the phenotypic variation. A population of 168 F3:4 families derived from a cross between two contrasting maize inbred lines for Al tolerance was evaluated using the NSRL and RSRL parameters in nutrient solution containing toxic level of aluminum. Variance analyses indicated that the NSRL was the most reliable phenotypic index to measure Al tolerance in the population, being used for further QTL mapping analysis. RFLP and SSR markers were selected for bulked segregant analysis, and additional SSR markers, flanking the polymorphisms of interest, were chosen in order to saturate the putative target regions. Seven linkage groups were constructed using 17 RFLP and 34 SSR markers. Five QTLs were mapped on chromosomes 2, 6 and 8, explaining 60% of the phenotypic variation. QTL4 and marker umc043 were located on chromosomes 8 and 5, close to genes encoding for enzymes involved in the organic acids synthesis pathways, a widely proposed mechanism for Al tolerance in plants. QTL2 was mapped in the same region as Alm2, also associated with Al tolerance in maize. In addition, dominant and additive effects were important in the control of this trait in maize..
650 $aAlumínio
650 $aGenética
650 $aMarcador Genético
650 $aMilho
653 $achromosomes-
653 $aCromossomo
653 $aMapeamento genético
700 1 $aGUIMARAES, C. T.
700 1 $aMARTINS, P. R.
700 1 $aPARENTONI, S. N.
700 1 $aCARNEIRO, N. P.
700 1 $aLOPES, M. A.
700 1 $aMORO, J. R.
700 1 $aPAIVA, E.
773 $tEuphytica, Wageningen$gv. 130, n. 2 p. 223-232, 2003.
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