Controle genético do teor proteico nos grãos e de caracteres agronômicos em milho cultivado com diferentes níveis de adubação nitrogenada
Carregando...
Data
2009-06
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
The objective of this work was to determine the genetic control of grain protein content and of the
agronomic traits of corn (Zea mays) at different levels of nitrogen fertilization. Nine parent populations and their
hybrids were evaluated in a complete diallel mating design, with two levels of nitrogen fertilization. The variables
evaluated were: relative chlorophyll index, plant height, ear height, ear production, grain yield, grain color, mass
of 100 grains, density of grains, nitrogen content in the leaves and grain protein content. Increasing levels of
nitrogen fertilization increased the relative chlorophyll index, ear height and grain protein content. However, only
grain production had distinct genetic control at different levels of nitrogen. Diallel analysis showed signifi cant
genotype effect in all traits, except for grain and ear production. For most of the variables, there was signifi cance of
heterosis effect. For grain protein content, there was no signifi cance for specifi c combining ability, and genotypes
general combining ability had more important effects in the expression of this character.
Descrição
Palavras-chave
Zea mays, Diallel analysis, Combining ability, Protein quality, Análise de dialelo, Capacidade de combinação, Qualidade da proteína
Citação
BUENO, Luíce Gomes et al. Controle genético do teor proteico nos grãos e de caracteres agronômicos em milho cultivado com diferentes níveis de adubação nitrogenada. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 44, n. 6, p. 590-598, jun. 2009.