Quantitative variation for grain quality in Brazilian maize populations

Scientia Agricola

Andréa Mittelmann²  José Branco De Miranda Filho¹  Luciano Lourenço Nass¹  Gustavo Júlio Melo Monteiro De Lima¹  Claudete Hara-klein¹  Ricardo Machado Da Silva¹ 

[1] ,Embrapa Gado de LeitePelotas RS ,Brasil

关键词: plant breeding;    nutritional quality;    protein;    amino acids;    melhoramento;    qualidade nutricional;    proteína;    aminoácidos;   

DOI  :  10.1590/S0103-90162011000100008

来源: SciELO

【 摘 要 】

Development of maize (Zea mays L.) cultivars with high grain protein and oil concentrations and an appropriate amino acid composition, without losses in grain yield, represents a challenge in breeding programs. The objective of this work was to study the nutritional quality of ten Brazilian maize populations evaluated in three environments. A randomized block design with six replications was used. Ear yield and the concentrations of protein, oil, serine, glutamic acid, alanine, leucine, tyrosine and phenylalanine were evaluated. Individual and combined analyses of variance were performed. Populations diverged for most of the traits. Environmental effects influenced variation for most of the traits, unlike genotype-environment interaction, allowing the selection on the average of environments. Positive association exists among protein and most of the amino acids, when considered on a dry matter basis and there is no association between nutritional quality and yield; therefore, the development of cultivars that are superior for both traits is expected to be feasible.

【 授权许可】

CC BY   
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