Consulta: creatorFacets:"Santos,Izabel Cristina dos"
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Data/hora: 10/06/2024 07:33:18

Combining ability of maize grain yield under different levels of environmental stress
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Souza,Leandro Vagno de; Miranda,Glauco Vieira; Galvão,João Carlos Cardoso; Guimarães,Lauro José Moreira; Santos,Izabel Cristina dos.
The objectives of this work were to caracterize the tropical maize germplasm and to compare the combining abilities of maize grain yield under different levels of environmental stress. A diallel was performed among tropical maize cultivars with wide adaptability, whose hybrid combinations were evaluated in two sowing dates, in two years. The significance of the environmental effect emphasized the environmental contrasts. Based on grain yield, the environments were classified as favorable (8,331 kg ha-1), low stress (6,637 kg ha-1), high stress (5,495 kg ha-1), and intense stress (2,443 kg ha-1). None of the genetic effects were significant in favorable and intense stress environments, indicating that there was low germplasm variability under these...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Abiotic stress; Breeding; Diallel; Drought.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001000013

Combining ability of tropical maize cultivars in organic and conventional production systems
Provedor de dados: Ciência Rural
Autores: Oliveira,Lucimar Rodrigues de; Miranda,Glauco Vieira; DeLima,Rodrigo Oliveira; Souza,Leandro Vagno de; Galvão,João Carlos Cardoso; Santos,Izabel Cristina dos.
The objectives were to identify maize germplasm for the organic productions system and to compare the genetic effects of the grain yield of maize cultivars in organic and conventional production systems. Diallel crosses were made between six maize cultivars and the hybrid combinations were evaluated in conventional and organic production systems. The hybrid combinations produced different grain yields in the two production systems. The interaction between general combining ability and production systems was significant for grain yield, ear height and number of ears. This indicates that the additive genetic effects differ in organic and conventional production systems. The specific combining abilities (SCA) were significant for grain yield and plant height,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Breeding; Selection; Diallel; Genotype x environment interaction.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000500001

Teores de metais pesados, K e Na, no substrato, em função de doses de composto orgânico de lixo urbano e de cultivares de alface
Provedor de dados: Ciência Rural
Autores: Santos,Izabel Cristina dos; Casali,Vicente Wagner Dias; Miranda,Glauco Vieira.
Visando a avaliar os teores de metais pesados, K e Na, no substrato, após a colheita da alface, foi instalado um ensaio com os cultivares Brasil 48, Regina 71, Vitória Verde Clara e Grand Rapids e as doses de composto orgânico de lixo urbano 0, 17,5, 35 e 52,5t ha-1, em casa de vegetação. Foram analisados: pH em água, condutividade elétrica, carbono orgânico e teores disponíveis de Pb, Cu, Mn, Zn, K e Na no solo. Os resultados demonstraram que as doses de composto orgânico de lixo urbano alteraram os valores de carbono orgânico, condutividade elétrica, pH e os teores disponíveis de Pb, Zn, Cu, Mn, K e Na do substrato após o cultivo dos quatro cultivares. Estes influenciaram os valores de carbono orgânico e os teores de Zn, Cu, Mn, K e Na do mesmo...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Metais pesados; Composto orgânico; Lixo urbano; Alface.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781999000300006