T-DNA chimeric integration and unexpected transgene expression are relevant constraints affecting transgenic plants. This study aims to properly investigate the occurrence of these events and to what extent they may be related. The final goal is to develop an effective screening tool for earlier selection of proper transgenic lines. A strategy based on qPCR and Southern blot was adopted for evaluating gus and Egfp chimerism degree in transgenic Vitis vinifera cv ‘Chardonnay’. Of nine transgenic lines, one had a very high chimerism value, which was shown to be associated with minimal transgene expression. The evaluation of the gus gene over time and space on a line selected as a model showed that transgene’s chimerism was stable and uniform throughout plant tissues whilst its expression was highly variable. Transgene chimerism issue was investigated in detail and useful hints were given for selecting the most favorable transgenic plants and for proper planning of in vitro and ex vitro experiments

Dalla Costa, L.; Pinto Sintra, A.L.; Campa, M.; Poletti, V.; Martinelli, L.; Malnoy, M.A. (2014). Development of analytical tools for evaluating the effect of T-DNA chimeric integration on transgene expression in vegetatively propagated plants. PLANT CELL TISSUE AND ORGAN CULTURE, 118 (3): 471-484. doi: 10.1007/s11240-014-0499-z handle: http://hdl.handle.net/10449/23471

Development of analytical tools for evaluating the effect of T-DNA chimeric integration on transgene expression in vegetatively propagated plants

Dalla Costa, Lorenza;Campa, Manuela;Poletti, Valentino;Martinelli, Lucia;Malnoy, Mickael Arnaud
2014-01-01

Abstract

T-DNA chimeric integration and unexpected transgene expression are relevant constraints affecting transgenic plants. This study aims to properly investigate the occurrence of these events and to what extent they may be related. The final goal is to develop an effective screening tool for earlier selection of proper transgenic lines. A strategy based on qPCR and Southern blot was adopted for evaluating gus and Egfp chimerism degree in transgenic Vitis vinifera cv ‘Chardonnay’. Of nine transgenic lines, one had a very high chimerism value, which was shown to be associated with minimal transgene expression. The evaluation of the gus gene over time and space on a line selected as a model showed that transgene’s chimerism was stable and uniform throughout plant tissues whilst its expression was highly variable. Transgene chimerism issue was investigated in detail and useful hints were given for selecting the most favorable transgenic plants and for proper planning of in vitro and ex vitro experiments
Chimerism
Genetically modified plants
Reporter genes
Transgene expression
Vitis vinifera
Settore BIO/11 - BIOLOGIA MOLECOLARE
2014
Dalla Costa, L.; Pinto Sintra, A.L.; Campa, M.; Poletti, V.; Martinelli, L.; Malnoy, M.A. (2014). Development of analytical tools for evaluating the effect of T-DNA chimeric integration on transgene expression in vegetatively propagated plants. PLANT CELL TISSUE AND ORGAN CULTURE, 118 (3): 471-484. doi: 10.1007/s11240-014-0499-z handle: http://hdl.handle.net/10449/23471
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