Abstract
A mannose selection system was adapted for use in the Agrobacterium-mediated transformation of Chinese cabbage. This system makes use of the pmi gene that encodes phosphomannose isomerase, which converts mannose-6-phosphate to fructose-6-phosphate. Hypocotyl explants from 4–5-day-old seedlings of Chinese cabbage inbred lines were pre-cultured for 2–3 days and then infected with Agrobacterium. Two genes (l-guluno-γ-lactone oxidase, GLOase, and jasmonic methyl transferase, JMT) were transformed into Chinese cabbage using the transformation procedure developed in this study. We found that supplementing the media with 7 g l−1 mannose and 2% sucrose provides the necessary conditions for the selection of transformed plants from nontransformed plants. The transformation rates were 1.4% for GLOase and 3.0% for JMT, respectively. The Southern blot analysis revealed that several independent transformants (T 0) were obtained from each transgene. Three different inbred lines were transformed, and most of the T 1 plants had normal phenotypes. The transformation method presented here for Chinese cabbage using mannose selection is efficient and reproducible, and it can be useful to introduce a desirable gene(s) into commercially useful inbred lines of Chinese cabbage.
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Abbreviations
- BA :
-
Benzyl-aminopurine
- pmi :
-
Phosphomannose isomerase
- NAA :
-
Naphthaleneacetic acid
- MS:
-
Murashige and Skoog
- JMT :
-
Jasmonic methyl transferase
- GLOase :
-
l-guluno-γ-lactone oxidase
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Acknowledgement
This research was supported by a grant (CG2242) from the Crop Functional Genomics Center of the 21st Century Frontier Research Program funded by the Ministry of the Science and Technology of the Republic of Korea.
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Communicated by J. R. Liu
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Min, BW., Cho, YN., Song, MJ. et al. Successful genetic transformation of Chinese cabbage using phosphomannose isomerase as a selection marker. Plant Cell Rep 26, 337–344 (2007). https://doi.org/10.1007/s00299-006-0247-x
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DOI: https://doi.org/10.1007/s00299-006-0247-x