Understanding Genetic and Molecular Bases of Fe and Zn Accumulation Towards Development of Micronutrient-Enriched Maize

Gupta, H. S.; Hossain, Firoz; Nepolean, T.; Vignesh, M.; Mallikarjuna, Mallana Gowdra

doi:10.1007/978-81-322-2169-2_17

Cited by 24 publications

(36 citation statements)

References 159 publications

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“…This could be possibly due to linkage between the genes affecting the accumulations or pleotropic effects of the genes governing the accumulation of micronutrients and the existence of one or more common genetic-physiological mechanisms involved in mineral absorption or uptake by the root system, translocation and redistribution within the plant tissues, remobilization to the grain, or accumulation in the developing grain (Çakmak, 2008;Peleg et al, 2008;Chatvaz et al, 2010). Positive correlation was observed between kernel Fe and Znc contents by Qin et al (2012), and it might be due to the colocalization of QTLs for both the traits which was also reported in the review of Gupta et al, (2015), there by suggesting the feasibility of simultaneous improvement of the both. Negative correlation of protein content with starch and oil contents showed that which trait should be selected in the breeding program.…”

Section: Discussionsupporting

confidence: 69%

Genetic Variation for Biofortifying The Maize Grain

Cömertpay¹,

Baloch

Erdem

2016

Turkish JAF Sci.Tech.

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The maize germplasm variation is valuable for breeders to develop elite hybrids with increased mineral contents in the maize grain to eliminate mineral malnutrition, which is referred as HIDEN HUNGER. Therefore, we aimed to determine mineral element diversity of maize landraces collected from different geographical regions of Turkey. There was huge diversity for all mineral traits and other quality traits. Turkish maize landraces showed high variation for Zn (17-41.34 mg kg-1), Fe (13.52-29.63 mg kg-1), Cu (0.77-3.34 mg kg-1), Mn (5.68-14.78 mg kg-1), Protein (6.6-11.6%), starch content (73.3-80.0%), oil content (3.15-4.7%) and thousand grain weight (177.0-374.9g). There were significant positive and negative associations among mineral elements and quality traits. The principal component analysis differentiated some maize landraces from the rest, and these diverse landraces could be used in the maize breeding program with biofortification purpose.

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Section: Discussionsupporting

confidence: 69%

Genetic Variation for Biofortifying The Maize Grain

Cömertpay¹,

Baloch

Erdem

2016

Turkish JAF Sci.Tech.

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“…The Caco-2 cell model is among the most abundantly used in vitro systems to estimate bioavailable Fe. Anionic phytate is the main storage form of P that is mostly found in ripened grains and seeds and hinders bioavailability of Fe and Zn by making complexes with their cations in the gastrointestinal tract (Zhou and Erdman, 1995;Gupta et al, 2015). The Caco-2 model converts Fe 3+ to Fe 2+ during uptake and synthesizes ferritin (intracellular Fe storage protein), which is used as a Fe bioavailability indicator.…”

Section: Determination Of Iron and Zinc Bioavailabilitymentioning

confidence: 99%

“…It is present in vegetables, fruits, some cereals and legumes, tea, coffee, and wine. Tannins are abundant polyphenols in plants ( Klopfenstein and Hoseney, 1995) that make insoluble complexes with Fe 3+ and reduce its bioavailability in the gut (Gillooly et al, 1984;Gupta et al, 2015). In cereals and legumes, polyphenols enhance the inhibitory effect of phytic acid (Brnić et al, 2014;Tako et al, 2016).…”

Section: Determination Of Iron and Zinc Bioavailabilitymentioning

confidence: 99%

Iron and Zinc in Maize in the Developing World: Deficiency, Availability, and Breeding

et al. 2018

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Maize (Zea mays L.) is the third most important cereal in the world and the most important food security crop in sub‐Saharan Africa. Maize provides energy and micronutrients. Deficiencies of the essential micronutrients Zn and Fe are fifth and sixth ranked among the top 10 most important risk factors for conditions such as anemia, low cognitive functioning, and impaired immune system (Fe deficiency) and diarrhea, skin inflammation, and recurrent infections (Zn deficiency) in humans, affecting more than two billion people worldwide. Poverty, lack of access to balanced diets and awareness, and low phytoavailability and bioavailability of these nutrients are major reasons for deficiencies. Breeding for mineral‐rich maize is a sustainable and cost‐effective approach to reduce micronutrient deficiencies. Since 2004, there has been significant progress in improving maize for Zn content. The aim of this review was to capture recent developments, trends, and progress in maize Fe and Zn biofortification and to identify challenges and ways to overcome them. HarvestPlus has set target levels for Fe (60 μg g−1) and Zn (38 μg g−1) in maize. Zinc target levels have been reached, but conventional breeding alone cannot enhance Fe to the recommended levels. Techniques such as oligo‐directed mutagenesis, reverse breeding, RNA‐directed DNA methylation, and gene editing could be used in future to speed up maize Fe biofortification. Additional research is required on Fe and Zn bioavailability in maize products, and on interactions of Fe and Zn with Ca and phytate and their influence on absorption, to better understand the underlying mechanisms.

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“…In India, lpa2-2 allele has been successfully introgressed into elite inbreds at TNAU and markerassisted introgression of lpa1 and lpa2 mutants in early maturing inbreds, viz. 'CM145' and 'V334', has been carried out at Vivekanda Parvatiya Krishi Anusandhan Sansthan (VPKAS) 27,28 .…”

Section: Low Phytatementioning

confidence: 99%