Hee-Chang Shin

A low soybean self-sufficiency rate in South Korea has caused a high import dependence and considerable price variation between domestic and foreign soybeans, causing the false labeling of foreign soybeans as domestic. Conventional soybean origin discrimination methods prevent a single-grain analysis and rely on the presence or absence of several compounds or concentration differences. This limits the origin discrimination of mixed samples, demonstrating the need for a method that analyzes individual grains. Therefore, we developed a method for origin discrimination using genetic analysis. The whole-genome sequencing data of the Williams 82 reference cultivar and 15 soybean varieties cultivated in South Korea were analyzed to identify the dense variation blocks (dVBs) with a high single-nucleotide polymorphism density. The PCR primers were prepared and validated for the insertion–deletion (InDel) sequences of the dVBs to discriminate each soybean variety. Our method effectively discriminated domestic and foreign soybean varieties, eliminating their false labeling.

A Study on Rapid Residual Analysis of Benzo(a)pyrene in Agricultural Products and Soils-Agricultural products,Benzo(a)pyrene,QuEChERS,Rapid residual analysis,Soil

Arsenic Speciation and Risk Assessment of Miscellaneous Cereals by HPLC-ICP-MS-Arsenic species,Miscellaneous cereals,PTWI,Risk assessment