Stable Inheritance of an Integrated Transgene and Its Expression in Phenylethylisothiocyanate-Enriched Transgenic Chinese cabbage
- Stable Inheritance of an Integrated Transgene and Its Expression in Phenylethylisothiocyanate-Enriched Transgenic Chinese cabbage
- 김형석; 박지현; 이기호; 유재경; 박영두
- Issue Date
- VOL 34, NO 1-121
- Development of genetically-modified (GM) crops enables the introduction of new traits to the plant to confer characteristics such as disease resistance, herbicide resistance and human healthpromoting bioactivity. Successful commercialization of newly developed GM crops requires stable inheritance of integrated T-DNA and newly introduced traits through the multiple generations. This study was carried out to confirm the stable inheritance of the integrated T-DNA in T1 and T2 transgenic Chinese cabbage (Brassica rapa ssp. pekinensis) that was genetically modified to increase concentrations of phenylethylisothiocyanate (PEITC), which is a potential anti-carcinogenic phytochemical. For this purpose, the IGA 1-3 (T1 generation) and IGA 1-3-5 (T2 generation) lines were selected by PCR and a IGA 1-3 transgenic plant (T1 generation) was analyzed to confirm the T-DNA insertion site in the Chinese cabbage genome by VA-TAIL PCR. The results of this study showed that the introduced T-DNA in IGA 1 line was stably inherited to the next generations without any variations in terms of the structure of the transgenes, and this line also showed the expected transgene function that resulted in increased concentration of PEITC through the multiple generations. Finally, we confirmed the increased QR activity in IGA 1 T1 and T2 transgenic lines, which indicates an enhanced potentia anti-carcinogenic bioactivity and its stable inheritance in IGA1 T1 and T2 transgenic lines.
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