Variation in grain arsenic assessed in a diverse panel of rice (Oryza sativa) grown in multiple sites

A - Papers appearing in refereed journals

Norton, G. J., Pinson, S. R. M., Alexander, J., Mckay, S., Hansen, H., Duan, G-L., Islam, M. R., Islam, S., Stroud, J. L., Zhao, F-J., McGrath, S. P., Zhu, Y-G., Lahner, B., Yakubova, E., Guerinot, M. L., Tarpley, L., Eizenga, G. C., Salt, D. E., Meharg, A. A. and Price, A. H. 2012. Variation in grain arsenic assessed in a diverse panel of rice (Oryza sativa) grown in multiple sites. New Phytologist. 193 (3), pp. 650-664.

AuthorsNorton, G. J., Pinson, S. R. M., Alexander, J., Mckay, S., Hansen, H., Duan, G-L., Islam, M. R., Islam, S., Stroud, J. L., Zhao, F-J., McGrath, S. P., Zhu, Y-G., Lahner, B., Yakubova, E., Guerinot, M. L., Tarpley, L., Eizenga, G. C., Salt, D. E., Meharg, A. A. and Price, A. H.
Abstract

Inorganic arsenic (Asi) in rice (Oryza sativa) grains is a possible threat to human health, with risk being strongly linked to total dietary rice consumption and consumed rice Asi content. This study aimed to identify the range and stability of genetic variation in grain arsenic (As) in rice. Six field trials were conducted (one each in Bangladesh and China, two in Arkansas, USA over 2 yr, and two in Texas, USA comparing flooded and nonflood treatments) on a large number of common rice cultivars (c. 300) representing genetic diversity among international rice cultivars. Within each field there was a 334 fold range in grain As concentration which varied between rice subpopulations. Importantly, Asi correlated strongly with total As among a subset of 40 cultivars harvested in Bangladesh and China. Genetic variation at all field sites was a large determining factor for grain As concentration, indicating that cultivars low in grain As could be developed through breeding. The temperate japonicas exhibited lower grain As compared with other subpopulations. Effects for year, location and flooding management were also statistically significant, suggesting that breeding strategies must take into account environmental factors.

KeywordsPlant Sciences
Year of Publication2012
JournalNew Phytologist
Journal citation193 (3), pp. 650-664
Digital Object Identifier (DOI)doi:10.1111/j.1469-8137.2011.03983.x
PubMed ID22142234
Open accessPublished as green open access
FunderBiotechnology and Biological Sciences Research Council
Department for International Development (DFID)
National Science Foundation - US
Funder project or codeSEF
Publisher's version
Output statusPublished
PublisherWiley
Copyright licenseCC BY
Grant IDBBF0041841
IOS 0701119
PRGP 0606461
ISSN0028-646X

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