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Harnessing the Wild Relatives and Landraces for Fe and Zn Biofortification in Wheat through Genetic Interventions—A Review

Author

Listed:
  • Vivek Sharma

    (Rajasthan Agricultural Research Institute, Durgapura, Sri Karan Narendra Agriculture University, Jobner, Jaipur 302018, India)

  • Mukesh Choudhary

    (ICAR-Indian Institute of Maize Research, Ludhiana 141004, India
    School of Agriculture and Environment, The University of Western Australia, Perth 6009, Australia)

  • Pawan Kumar

    (ICAR-Indian Institute of Soil & Water Conservation, Dehradun 248195, India)

  • Jeet Ram Choudhary

    (ICAR-Indian Agricultural Research Institute, New Delhi 110012, India)

  • Jaswant S. Khokhar

    (School of Biosciences, Sutton Bonington Campus, University of Nottingham, Nottingham LE12 5RD, UK)

  • Prashant Kaushik

    (Kikugawa Research Station, Yokohama Ueki, 2265 Kamo, Kikugawa 439-0031, Japan)

  • Srinivas Goli

    (Australia India Institute, The University of Western Australia, Perth 6009, Australia)

Abstract

Micronutrient deficiencies, particularly iron (Fe) and zinc (Zn), in human diets are affecting over three billion people globally, especially in developing nations where diet is cereal-based. Wheat is one of several important cereal crops that provide food calories to nearly one-third of the population of the world. However, the bioavailability of Zn and Fe in wheat is inherently low, especially under Zn deficient soils. Although various fortification approaches are available, biofortification, i.e., development of mineral-enriched cultivars, is an efficient and sustainable approach to alleviate malnutrition. There is enormous variability in Fe and Zn in wheat germplasm, especially in wild relatives, but this is not utilized to the full extent. Grain Fe and Zn are quantitatively inherited, but high-heritability and genetic correlation at multiple locations indicate the high stability of Fe and Zn in wheat. In the last decade, pre-breeding activities have explored the potential of wild relatives to develop Fe and Zn rich wheat varieties. Furthermore, recent advances in molecular biology have improved the understanding of the uptake, storage, and bioavailability of Fe and Zn. Various transportation proteins encoding genes like YSL 2 , IRT 1 , OsNAS 3 , VIT 1 , and VIT 2 have been identified for Fe and Zn uptake, transfer, and accumulation at different developing stages. Hence, the availability of major genomic regions for Fe and Zn content and genome editing technologies are likely to result in high-yielding Fe and Zn biofortified wheat varieties. This review covers the importance of wheat wild relatives for Fe and Zn biofortification, progress in genomics-assisted breeding, and transgenic breeding for improving Fe and Zn content in wheat.

Suggested Citation

  • Vivek Sharma & Mukesh Choudhary & Pawan Kumar & Jeet Ram Choudhary & Jaswant S. Khokhar & Prashant Kaushik & Srinivas Goli, 2021. "Harnessing the Wild Relatives and Landraces for Fe and Zn Biofortification in Wheat through Genetic Interventions—A Review," Sustainability, MDPI, vol. 13(23), pages 1-15, November.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:23:p:12975-:d:686083
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    References listed on IDEAS

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    3. Singh, Ravi & Govindan, Velu & Andersson, Meike S. (ed) & Bouis, Howarth (ed) & Jamora, Nelissa (ed), 2017. "Zinc-Biofortified Wheat: Harnessing Genetic Diversity for Improved Nutritional Quality," Briefs 283982, Global Crop Diversity Trust, Briefs.
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