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Registro Completo |
Biblioteca(s): |
Embrapa Arroz e Feijão. |
Data corrente: |
22/02/2006 |
Data da última atualização: |
23/02/2006 |
Autoria: |
OLIVEIRA, P. H. de; FEDERIZZI, L. C.; MILACH, S. C. K.; GOTUZZO, C.; SAWASATO, J. T. |
Título: |
Inheritance in oat (Avena sativa L.) of tolerance to soil aluminum toxicity. |
Ano de publicação: |
2005 |
Fonte/Imprenta: |
Crop Breeding and Applied Biotechnology, Viçosa, MG, v. 5, n. 3, p. 302-309, Sept. 2005. |
Idioma: |
Inglês |
Conteúdo: |
Aluminum toxicity is a limiting factor for the expression of the yield potential in oat. The development of aluminum toxicity-tolerant genotypes is the cheapest and most feasible alternative for cultivation of soils with acid subsoil. Objectives of this study were to determine the gene action, number of genes and heritability of tolerance of oat genotypes to toxic aluminum concentrations. Parent genotypes and the F1 and F2 generations of some crossings plus the F3, F4, F5, BC1F1, and BC2F1 generations were discriminated by the analysis of root regrowth in plantlets exposed to aluminum. Additive gene action predominated among the genetic effects. Only one segregating gene was found which has multiple alleles, two for tolerance (Al1 and Al2) and one for sensitivity (al). The heritability of the trait was high, indicating that tolerant genotypes can be selected in early generations of improvement programs.. |
Palavras-Chave: |
Genótipos; Genotypes; Herdabilidade; Herdability; Oat improvement; Raízes; Solos ácidos. |
Thesagro: |
Aveia; Avena Sativa; Melhoramento. |
Thesaurus Nal: |
acid soils; roots. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01763naa a2200313 a 4500 001 1213877 005 2006-02-23 008 2005 bl uuuu u00u1 u #d 100 1 $aOLIVEIRA, P. H. de 245 $aInheritance in oat (Avena sativa L.) of tolerance to soil aluminum toxicity. 260 $c2005 520 $aAluminum toxicity is a limiting factor for the expression of the yield potential in oat. The development of aluminum toxicity-tolerant genotypes is the cheapest and most feasible alternative for cultivation of soils with acid subsoil. Objectives of this study were to determine the gene action, number of genes and heritability of tolerance of oat genotypes to toxic aluminum concentrations. Parent genotypes and the F1 and F2 generations of some crossings plus the F3, F4, F5, BC1F1, and BC2F1 generations were discriminated by the analysis of root regrowth in plantlets exposed to aluminum. Additive gene action predominated among the genetic effects. Only one segregating gene was found which has multiple alleles, two for tolerance (Al1 and Al2) and one for sensitivity (al). The heritability of the trait was high, indicating that tolerant genotypes can be selected in early generations of improvement programs.. 650 $aacid soils 650 $aroots 650 $aAveia 650 $aAvena Sativa 650 $aMelhoramento 653 $aGenótipos 653 $aGenotypes 653 $aHerdabilidade 653 $aHerdability 653 $aOat improvement 653 $aRaízes 653 $aSolos ácidos 700 1 $aFEDERIZZI, L. C. 700 1 $aMILACH, S. C. K. 700 1 $aGOTUZZO, C. 700 1 $aSAWASATO, J. T. 773 $tCrop Breeding and Applied Biotechnology, Viçosa, MG$gv. 5, n. 3, p. 302-309, Sept. 2005.
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Embrapa Arroz e Feijão (CNPAF) |
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Registros recuperados : 140 | |
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