Iron biofortification in rice: An update on quantitative trait loci and candidate genes

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dc.creatorSwamy, B.P. Mallikarjuna
dc.creatorMarathi, Balram
dc.creatorRibeiro-Barros, Ana I. F.
dc.creatorCalayugan, Mark Ian C.
dc.creatorRicachenevsky, Felipe Klein
dc.date2021-05-26
dc.date2024-12-19T12:53:39Z
dc.date2024-12-19T12:53:39Z
dc.date.accessioned2026-06-27T04:15:02Z
dc.descriptionRice is the most versatile model for cereals and also an economically relevant food crop; as a result, it is the most suitable species for molecular characterization of Fe homeostasis and biofortification. Recently there have been significant efforts to dissect genes and quantitative trait loci (QTL) associated with Fe translocation into rice grains; such information is highly useful for Fe biofortification of cereals but very limited in other species, such as maize (Zea mays) and wheat (Triticum aestivum). Given rice’s centrality as a model for Poaceae species, we review the current knowledge on genes playing important roles in Fe transport, accumulation, and distribution in rice grains and QTLs that might explain the variability in Fe concentrations observed in different genotypes. More than 90 Fe QTLs have been identified over the 12 rice chromosomes. From these, 17 were recorded as stable, and 25 harbored Fe-related genes nearby or within the QTL. Among the candidate genes associated with Fe uptake, translocation, and loading into rice grains, we highlight the function of transporters from the YSL and ZIP families; transporters from metal-binding molecules, such as nicotianamine and deoxymugineic acid; vacuolar iron transporters; citrate efflux transporters; and others that were shown to play a role in steps leading to Fe delivery to seeds. Finally, we discuss the application of these QTLs and genes in genomics assisted breeding for fast-tracking Fe biofortification in rice and other cereals in the near future.
dc.identifierhttps://hdl.handle.net/10568/164267
dc.identifier.urihttp://hdl.handle.net/123456789/26550
dc.languageen
dc.publisherFrontiers Media
dc.rightsOpen Access
dc.sourceSwamy, B. P. Mallikarjuna; Marathi, Balram; Ribeiro-Barros, Ana I. F.; Calayugan, Mark Ian C. and Ricachenevsky, Felipe Klein. 2021. Iron biofortification in rice: An update on quantitative trait loci and candidate genes. Front. Plant Sci., Volume 12
dc.subjectplant science
dc.titleIron biofortification in rice: An update on quantitative trait loci and candidate genes
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)