Genetic Basis and Breeding Perspectives of Grain Iron and Zinc Enrichment in Cereals

Frontiers in Plant Science
Ana Luisa Garcia-OliveiraMelaku Gedil

Abstract

Micronutrient deficiency, also known as "hidden hunger," is an increasingly serious global challenge to humankind. Among the mineral elements, Fe (Iron) and Zn (Zinc) have earned recognition as micronutrients of outstanding and diverse biological relevance, as well as of clinical importance to global public health. The inherently low Fe and Zn content and poor bioavailability in cereal grains seems to be at the root of these mineral nutrient deficiencies, especially in the developing world where cereal-based diets are the most important sources of calories. The emerging physiological and molecular understanding of the uptake of Fe and Zn and their translocation in cereal grains regrettably also indicates accumulation of other toxic metals, with chemically similar properties, together with these mineral elements. This review article emphasizes breeding to develop bioavailable Fe- and Zn-efficient cereal cultivars to overcome malnutrition while minimizing the risks of toxic metals. We attempt to critically examine the genetic diversity regarding these nutritionally important traits as well as the progress in terms of quantitative genetics. We sought to integrate findings from the rhizosphere with Fe and Zn accumulation in grain, ...Continue Reading

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Jun 6, 2019·The Biochemical Journal·Amelie DetterbeckStephan Clemens
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Methods Mentioned

BETA
dissection

Software Mentioned

HarvestPlus
CGIAR HarvestPlus
CGIAR

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