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2018 Fiscal Year Final Research Report

Tracing geographical origin of Asian rice by using stable isotope and trace element analysis

Research Project

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Project/Area Number 16K16302
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Eating habits
Research InstitutionNational Agriculture and Food Research Organization

Principal Investigator

SUZUKI Yaeko  国立研究開発法人農業・食品産業技術総合研究機構, 食品研究部門, 主任研究員 (00515059)

Project Period (FY) 2016-04-01 – 2019-03-31
Keywords米 / トレーサビリティ / 安定同位体比 / 微量元素組成
Outline of Final Research Achievements

To establish discriminating model of Asian rice samples, we collected 358 authentic rice samples from 13 countries by FAO/IAEA Technical Co-operation Projects (RAS 5062 and RAS5081) . We determined their stable isotopic compositions (carbon, nitrogen sulfur, oxygen and strontium) and 18 element compositions (B, Mg, Al, K, Ca, Mn, Fe, Co, Ni, Cu, Zn, As, Rb, Sr, Mo, Cd, Ba and Pb). There were differences in carbon, oxygen and sulfur isotope ratios among Asian countries. There is overlap in the distribution of carbon and oxygen isotope ratios between rice from China and Japan. Strontium isotope ratios of Japanese rice are relatively lower than those of Chinese rice. Moreover, by combining the stable isotope ratios and elements, the classifications of the geographical origin of Asian rice samples are improved. These results suggested that stable isotope and trace element analyses are useful tool to discriminate the geographical origin of Asian rice samples.

Free Research Field

食品分析

Academic Significance and Societal Importance of the Research Achievements

米はアジアの食文化において重要な農作物の一つであり、各国に守りたいブランド米が存在するため、科学的根拠に基づくアジアの米のトレーサビリティシステムの開発が大きな課題となっている。本研究では、アジア太平洋地域プロジェクトにおいて収集した米について、生育環境を反映する安定同位体比および無機元素組成を分析した結果、アジア各国の米の産地判別の可能性が示唆された。本研究のデータは,プロジェクトに参加しているアジア太平洋地域の国々と共有されており,今後アジア地域の米の信頼性確保への貢献が期待される。

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Published: 2020-03-30  

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