[Detection of genetically modified organisms obtained from food samples ]

Area of Science:

• Food Science
• Molecular Biology
• Agricultural Biotechnology

Context:

• The presence of genetically modified organisms (GMOs) in the food supply is a significant concern for consumers and regulatory bodies.
• Soybean and corn are major agricultural commodities frequently modified for traits like herbicide resistance.

Purpose:

• To detect and quantify specific genetically modified organisms (GMOs), including Roundup Ready Soybean (RRS) and genetically modified (GM) corn, in various food products available in the Tokyo area.
• To assess the prevalence and levels of RRS in processed soybean products and GM corn in corn-derived foods.

Summary:

• Using PCR and real-time PCR, Roundup Ready Soybean (RRS) was identified in 3 of 37 tofu, 2 of 3 nama-age, 2 of 3 yuba, and 3 of 3 abura-age samples.
• RRS was detected in 42 of 178 soybean samples, with levels ranging from 0.1-1.4% in identity-preserved soybeans and 49.8-78.8% in non-segregated soybeans.
• Genetically modified (GM) corn was detected in 8 of 26 samples, with amounts ranging from 0.1-2.0%. However, other surveyed GMOs (CBH351 corn, NewLeaf Plus/Y potato, 55-1 papaya) were not detected.

Impact:

• This study provides crucial data on the occurrence of specific GMOs in the Japanese food market during the early 2000s.
• Findings highlight the importance of monitoring processed foods for GMO content, particularly for RRS in soybean products.
• The quantitative data on RRS levels in different soybean types offers insights into potential cross-contamination or segregation issues.