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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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In order to better utilize insertional mutagenesis and functional genomics in Chinese cabbage, we have developed an improved transformation system that more efficiently produces a large number of transgenic plants. Hypocotyl explants were inoculated with Agrobacterium tumefaciens LBA4404. This strain harbors tagging vector pRCV2, which contains a hygromycin-resistance gene, an ampicillin resistance gene, and a bacterial replication origin within the T-DNA. Transformation efficiency was highest when the explants were first co-cultivated for 3 d in a medium supplemented with 5 mg L-1 acetosyringone, then transferred to a 0.8% agar selection medium containing 10 mg L-1 hygromycin. In addition, maintaining a low pH in the co-cultivation medium was critical to enhancing transformation frequency. A total of 3369 transgenic plants were obtained, with efficiencies ranging from 2.89% to 5.00%. Southern blot analysis and T1 progeny tests from 120 transgenic plants confirmed that the transgenes were stably inherited to the next generation. We also conducted plasmid rescue and inverse PCR with some transformants, based on their phenotype, to demonstrate the applicability of T-DNA tagging in Chinese cabbage. The tagged sequences were then analyzed.
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