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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá; Embrapa Milho e Sorgo. |
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Data corrente: |
04/06/1997 |
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Data da última atualização: |
13/06/2019 |
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Autoria: |
MAGNAVACA, R. |
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Afiliação: |
EMBRAPA/CNPMS. |
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Título: |
Genetic variability and the inheritance of aluminum tolerance in maize (Zea mays L.). |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
1982. |
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Páginas: |
135 f. |
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Idioma: |
Inglês |
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Notas: |
Doctor Sc. Thesis. Lincoln: University of Nebraska, 1982. |
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Conteúdo: |
Maize genotypes were grown in nutrient solutions with different levels of Al and P to study genetic variability and the inheritance of Al tolerance. Brazilian inbred lines evaluated on acid soils of that country were substantially more tolerant than American lines when grown in nutrient solutions with added Al. responses of inbred lines to Al levels were found to be affected by the P level in the nutrient solution. The inheritance of Al tolerance was studied in nutrient solutions with 185 uM Al and 45 uM P. Root lengths of generations (P1, P2, F1; F2, BC1 and BC2) derived from crosses between tolerant and montolerant inbred lines showed that additive gene effects explained most of the genetic variation for Al tolerance. Dominance effects accounted for abouthalf as much variation as did additive effects. Epistasis effects were small compared to the others. The frequency distributions of plants within the F2 generations were found to be continous, unimodal and typical for a quantitatively inheritance trait, with a general tendency for montolerance to be dominant over tolerance. In a diallel cross among inbred lines, the analysis of F1 crosses indicated that the variance for general combining ability explained most of the variation, but specific combining ability was always statistically significant. The original Brazilian population "Composto Amplo" and the fourth cycle of selection of grain in an acid soil that country were compared at different Al levels in nutrient solution. Root lengths of the original (...) MenosMaize genotypes were grown in nutrient solutions with different levels of Al and P to study genetic variability and the inheritance of Al tolerance. Brazilian inbred lines evaluated on acid soils of that country were substantially more tolerant than American lines when grown in nutrient solutions with added Al. responses of inbred lines to Al levels were found to be affected by the P level in the nutrient solution. The inheritance of Al tolerance was studied in nutrient solutions with 185 uM Al and 45 uM P. Root lengths of generations (P1, P2, F1; F2, BC1 and BC2) derived from crosses between tolerant and montolerant inbred lines showed that additive gene effects explained most of the genetic variation for Al tolerance. Dominance effects accounted for abouthalf as much variation as did additive effects. Epistasis effects were small compared to the others. The frequency distributions of plants within the F2 generations were found to be continous, unimodal and typical for a quantitatively inheritance trait, with a general tendency for montolerance to be dominant over tolerance. In a diallel cross among inbred lines, the analysis of F1 crosses indicated that the variance for general combining ability explained most of the variation, but specific combining ability was always statistically significant. The original Brazilian population "Composto Amplo" and the fourth cycle of selection of grain in an acid soil that country were compared at different Al levels in nutrient solutio... Mostrar Tudo |
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Palavras-Chave: |
Acid soil; Aluminium; Genetic variability; Maize; Tolerance; Tolerancia; Variabilidade. |
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Thesagro: |
Alumínio; Genética; Milho; Solo Ácido; Zea Mays. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02252nam a2200277 a 4500
001 1343681
005 2019-06-13
008 1982 bl uuuu m 00u1 u #d
100 1 $aMAGNAVACA, R.
245 $aGenetic variability and the inheritance of aluminum tolerance in maize (Zea mays L.).
260 $a1982.$c1982
300 $a135 f.
500 $aDoctor Sc. Thesis. Lincoln: University of Nebraska, 1982.
520 $aMaize genotypes were grown in nutrient solutions with different levels of Al and P to study genetic variability and the inheritance of Al tolerance. Brazilian inbred lines evaluated on acid soils of that country were substantially more tolerant than American lines when grown in nutrient solutions with added Al. responses of inbred lines to Al levels were found to be affected by the P level in the nutrient solution. The inheritance of Al tolerance was studied in nutrient solutions with 185 uM Al and 45 uM P. Root lengths of generations (P1, P2, F1; F2, BC1 and BC2) derived from crosses between tolerant and montolerant inbred lines showed that additive gene effects explained most of the genetic variation for Al tolerance. Dominance effects accounted for abouthalf as much variation as did additive effects. Epistasis effects were small compared to the others. The frequency distributions of plants within the F2 generations were found to be continous, unimodal and typical for a quantitatively inheritance trait, with a general tendency for montolerance to be dominant over tolerance. In a diallel cross among inbred lines, the analysis of F1 crosses indicated that the variance for general combining ability explained most of the variation, but specific combining ability was always statistically significant. The original Brazilian population "Composto Amplo" and the fourth cycle of selection of grain in an acid soil that country were compared at different Al levels in nutrient solution. Root lengths of the original (...)
650 $aAlumínio
650 $aGenética
650 $aMilho
650 $aSolo Ácido
650 $aZea Mays
653 $aAcid soil
653 $aAluminium
653 $aGenetic variability
653 $aMaize
653 $aTolerance
653 $aTolerancia
653 $aVariabilidade
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Embrapa Amapá (CPAF-AP) |
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