Establishment of an enhancer trap system with Ds and GUS for functional genomics in rice

Molecular Genetics and Genomics : MGG
Y ItoN Kurata

Abstract

To develop an efficient means of enhancer trapping, a two-element system employing Ds and an Ac transposase (AcTPase) gene was tested in rice. We generated 263 transgenic rice plants, each of which harboured the maize transposable element Ds together with a GUS coding sequence under the control of a minimal promoter (Ds-GUS), and a gene that confers resistance to the herbicide chlorsulfuron. Among the 263 lines generated, 42 were shown to have a single copy of the Ds-GUS element. Four single-copy lines were crossed with each of six transgenic plants that carried the AcTPase gene. Excision of the Ds-GUS in leaves of F1 plants was detected in eight combinations out of seventeen examined. The frequency of transposition of Ds-GUS in germ cells in the F1 plants was examined using 10,524 F2 plants, and 675 (6%) were judged to be transposants. Their frequencies differed among F1 plants depending on the AcTPase x Ds-GUS cross considered, and also among panicles on the same F1 plant. This suggests that Ds-GUS tends to transpose during panicle development. Southern analysis with a GUS probe showed different band patterns among transposants derived from different panicles. Therefore, the transposants derived from different panicles must h...Continue Reading

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Citations

Mar 1, 2006·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Narayana M UpadhyayaElizabeth S Dennis
Apr 13, 2007·Plant Molecular Biology·Michael A AyliffeAnthony J Pryor
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