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A two-element Enhancer-Inhibitor transposon system in Arabidopsis thaliana

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Abstract

The Enhancer-Inhibitor (En-I), also known as Suppressor-mutator (Spm-dSpm), transposable element system of maize was modified and introduced into Arabidopsis by Agrobacterium tumefaciens transformation. A stable En/Spm transposase source under control of the CaMV 35S promoter mediated frequent transposition of I/dSpm elements. Transposition occurred continuously throughout plant development over at least seven consecutive plant generations after transformation. New insertions were found at both linked and unlinked positions relative to a transposon donor site. The independent transposition frequency was defined as a transposition parameter, which quantified the rate of unique insertion events and ranged from 7.8% to 29.2% in different populations. An increase as well as a decrease in I/dSpm element copy number was seen at the individual plant level, but not at the population level after several plant generations. The continuous, frequent transposition observed for this transposon system makes it an attractive tool for use in gene tagging in Arabidopsis.

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Communicated by H. Saedler

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Aarts, M.G.M., Corzaan, P., Stiekema, W.J. et al. A two-element Enhancer-Inhibitor transposon system in Arabidopsis thaliana . Molec. Gen. Genet. 247, 555–564 (1995). https://doi.org/10.1007/BF00290346

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  • DOI: https://doi.org/10.1007/BF00290346

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