Abstract
A cotransformation system using somatic embryos was developed to produce grapevines free of selectable marker genes. This was achieved by transforming Vitis vinifera L. “Thompson Seedless” somatic embryos with a mixture of two Agrobacterium strains. The first strain contained a binary plasmid with an egfp gene of interest between the T-DNA borders. The second strain harbored the neomycin phosphotransferase (nptII) gene for positive selection and the cytosine deaminase (codA) gene for negative selection, linked together by a bidirectional dual promoter complex. Our technique included a short positive selection phase of cotransformed somatic embryos on liquid medium containing 100 mg/L kanamycin before subjecting cultures to prolonged negative selection on medium containing 250 mg/L 5-fluorocytosine.
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Dutt, M., Li, Z.T., Dhekney, S.A., Gray, D.J. (2012). Co-transformation of Grapevine Somatic Embryos to Produce Transgenic Plants Free of Marker Genes. In: Dunwell, J., Wetten, A. (eds) Transgenic Plants. Methods in Molecular Biology, vol 847. Humana Press. https://doi.org/10.1007/978-1-61779-558-9_17
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DOI: https://doi.org/10.1007/978-1-61779-558-9_17
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