Abstract
The selectable marker system, which utilizes the pmi gene encoding for phosphomannose-isomerase that converts mannose-6-phosphate to fructose-6-phosphate, was adapted for Agrobacterium-mediated transformation of cucumber (Cucumis sativus L.). Only transformed cells were capable of utilizing mannose as a carbon source. The highest transformation frequency of 23% was obtained with 10 g/l mannose and 10 g/l sucrose in the medium. Molecular, genetic analysis, and PMI activity assay showed that the regenerated shoots contained the pmi gene and the gene was transmitted to the progeny in a Mendelian fashion. The results indicated that the mannose selection system, which is devoid of the disadvantages of antibiotic or herbicide selection, could be used for cucumber Agrobacterium-mediated transformation.





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Acknowledgements
The authors would like to thank Syngenta Corp. for providing pmi gene. This project was supported by a grant from Hubei Provincial Department of Education (2004Q001), a grant from the Office of Science and Technology of Yichang (A04401-12), and a grant from China Three Gorges University (KJB0302).
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He, Z., Duan, Z., Liang, W. et al. Mannose selection system used for cucumber transformation. Plant Cell Rep 25, 953–958 (2006). https://doi.org/10.1007/s00299-006-0156-z
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DOI: https://doi.org/10.1007/s00299-006-0156-z

