Genotypic variation in milling depression of iron and zinc concentration in rice grain

Background and aims The loss of iron and zinc during milling to produce white rice can have serious consequences for human health. Therefore, the objective was to evaluate Fe and Zn partitioning between the endosperm, bran and embryo, and the milling loss of these nutrients among Thai rice genotypes...

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Bibliographic Details
Published in:Plant and soil 2012-12, Vol.361 (1-2), p.271-278
Main Authors: Saenchai, Chorpet, Prom-u-thai, Chanakan, Jamjod, Sansanee, Dell, Bernard, Rerkasem, Benjavan
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Animal, plant and microbial ecology
Biological and medical sciences
Biomedical and Life Sciences
Crop production
Ecology
Embryos
Endosperm
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
Genetic diversity
Genetic variation
Genotype & phenotype
Genotypes
Grain
Grain milling
Grains
Iron
Life Sciences
Nutrients
Oryza sativa
Plant Physiology
Plant Sciences
Regular Article
Rice
Soil Science & Conservation
Soil-plant relationships. Soil fertility
Soil-plant relationships. Soil fertility. Fertilization. Amendments
Staple foods
Wetlands
Zinc
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Summary:Background and aims The loss of iron and zinc during milling to produce white rice can have serious consequences for human health. Therefore, the objective was to evaluate Fe and Zn partitioning between the endosperm, bran and embryo, and the milling loss of these nutrients among Thai rice genotypes. Methods Concentrations of iron and zinc and their partitioning to different parts of the grain were examined in 15 genotypes of Thai rice (10 belonging to the long-slender grain type) grown together under wetland condition. Results The depression in grain Fe and Zn concentrations (24–60 and 10–58 %, respectively) on milling differed among rice genotypes and were affected by the extent of differential partitioning of Fe and Zn into different parts of the grain. For example, nearly 70 % of white rice Zn was allocated to the endosperm in contrast to only 43 % for Fe. Conclusions Because of variation in milling loss of Fe and Zn, that can result from genotypic variation in the degree of milling and partitioning of Fe and Zn into different parts of the grain, we conclude that white rice Fe and Zn concentrations should not be inferred solely from brown rice concentrations of these nutrients.
ISSN:0032-079X
1573-5036
DOI:10.1007/s11104-012-1228-1