Identification of low phytic acid and high Zn bioavailable rice (Oryza sativa L.) from 69 accessions of the world rice core collection

Perera, Ishara and Fukushima, Ayaka and Arai, Mako and Yamada, Kenta and Nagasaka, Seiji and Seneweera, Saman and Hirotsu, Naoki (2019) Identification of low phytic acid and high Zn bioavailable rice (Oryza sativa L.) from 69 accessions of the world rice core collection. Journal of Cereal Science, 85. pp. 206-213. ISSN 0733-5210

Abstract

Improving the micronutrient content and reducing the phytic acid (PA) in major staple food crops through plant breeding techniques are considered sustainable strategies to increase micronutrient bioavailability. This study documents the variation in PA and zinc (Zn) contents within the natural genetic variation of rice using the World Rice Core collection (WRC) and identifies useful genetic determinants in the Zn biofortification process. Some WRC accessions were observed having a low PA content and high Zn bioavailability and some others with a high PA content and low calculated Zn absorption. No significant differences were observed in the mineral or heavy metal contents among low and high PA lines examined suggesting that different mechanisms are controlling these traits, so that manipulating the PA content could be achieved without affecting the concentration of these elements. A genome-wide association study revealed that a chromosomal region near several significant SNPs determines the natural variation in rice PA content. Furthermore, a low PA trait in rice, rather than a high Zn content should be the key target for increasing Zn bioavailability.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Date Deposited: 06 Sep 2019 01:00
Last Modified: 18 Sep 2019 05:58
Uncontrolled Keywords: bioavailability; genome-wide association study; phytic acid; Zinc
Fields of Research : 05 Environmental Sciences > 0502 Environmental Science and Management > 050299 Environmental Science and Management not elsewhere classified
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070399 Crop and Pasture Production not elsewhere classified
Identification Number or DOI: 10.1016/j.jcs.2018.12.010
URI: http://eprints.usq.edu.au/id/eprint/36962

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