| Registro completo |
| Provedor de dados: |
Bragantia
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| País: |
Brazil
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| Título: |
Genetic control of aluminum tolerance in tropical maize germplasm
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| Autores: |
Coelho,Caroline de Jesus
Bombardelli,Renato Gustavo Hoffmann
Schulze,Guilherme Stalchmidt
Caires,Eduardo Fávero
Matiello,Rodrigo Rodrigues
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| Data: |
2019-03-01
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| Ano: |
2019
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| Palavras-chave: |
Combining ability
Heritability
Inheritance
Zea mays L.
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| Resumo: |
ABSTRACT Aluminum (Al) toxicity is the most limiting factor to maize crop productivity in acid soils. Therefore, the understanding of inheritance of Al tolerance in maize is important for the developmentof more adequate procedures for Al tolerant genotypes selection. In this sense, the objectives of this study were to determine the inheritance, and the general (GCA) and specific combining ability (SCA) for Al tolerance in tropical maize. First, we evaluated diallel crosses of maize from landrace and hybrid germplasms for Al tolerance through the minimal solution methodology. The DIF data (root growth difference) were analyzed by Griffing diallel model. Later the additive-dominant genetic model proposed by Mather and Jinks (1971) was used to estimate the genetic effects. The results of the diallel analysis showed greater variability associated with the estimates of the SCA for both germplasm. The diallel crosses involving the V 06 (Dente de Ouro 2) landrace stood out by high SCA and GCA for Al tolerance. The generation mean analysis indicated quantitative inheritance of Al tolerance in this germplasm, with most of the variance explained by the additive effects. The heritability in the narrow sense varied from 47% to 71%, indicating the possibility of genetic gain with the selection of tolerant genotypes in F2 generation. Additive gene action associated with intermediate heritability and quantitative inheritance demonstrates the possibility of genetic gains with artificial selection for Al tolerance in this maize germplasm.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000100071
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| Editor: |
Instituto Agronômico de Campinas
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| Relação: |
10.1590/1678-4499.2017396
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| Formato: |
text/html
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| Fonte: |
Bragantia v.78 n.1 2019
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| Direitos: |
info:eu-repo/semantics/openAccess
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