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Molecular and genetic characterization of elite transgenic rice plants produced by electric-discharge particle acceleration

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Abstract

The recovery of transgenic rice plants expressing a number of exogenous genes was reported previously. Using immature embryo explants as the target tissue, plasmids containing both selectable and screenable marker genes were introduced into elite rice varieties via electric-discharge particle acceleration. Co-integration, copy number, expression, and inheritance of these genes were analyzed. A 100% co-integration frequency was confirmed by Southern-blot analyses of R0 plants. The majority of transgenic plants contained between one and ten copies of exogenous DNA and molecular and genetic analyses of progeny indicated that all copies in almost all R0 plants were inherited as a single dominant hemizygous locus. Co-expression of unselected genes ranged from 30–66% for gus/hmr constructs, depending on the promotor used, and up to 90% for bar/hmr constructs. The integrative structures of two unlinked transgenic loci of a rare R0 plant were analyzed in detail by Southern-blot analysis of its progeny.

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  1. P. Christou

    Present address: John Innes Center, NR4 7UH, Norwich, UK

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  1. Agracetus Inc., 8520 University Green, 53562, Middleton, WI, USA

    J. Cooley, T. Ford & P. Christou

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  1. J. Cooley
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  2. T. Ford
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  3. P. Christou
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Communicated by I. Potrykus

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Cooley, J., Ford, T. & Christou, P. Molecular and genetic characterization of elite transgenic rice plants produced by electric-discharge particle acceleration. Theoret. Appl. Genetics 90, 97–104 (1995). https://doi.org/10.1007/BF00221001

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  • DOI: https://doi.org/10.1007/BF00221001

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