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Science 16 April 1993:
Vol. 260. no. 5106, pp. 342 - 344
DOI: 10.1126/science.8385803
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Articles

Science, Vol 260, Issue 5106, 342-344
Copyright © 1993 by American Association for the Advancement of Science

articles

Identification of a mobile endogenous transposon in Arabidopsis thaliana

YF Tsay, MJ Frank, T Page, C Dean, and NM Crawford

Department of Biology, University of California, San Diego, La Jolla 92093-0116.

A mobile endogenous transposable element, Tag1, has been identified in the plant Arabidopsis thaliana. Tag1 was found in the nitrate transporter gene, CHL1, of a chlorate-resistant mutant present in a population of plants containing an active maize Ac transposon. Tag1 excises from the chl1 gene producing chlorate-sensitive revertants with Tag1 or Tag1-related elements at different loci. Tag1 and related elements are present in the Landsberg but not Columbia or Wassilewskija ecotypes of Arabidopsis. Thus, Tag1 provides a tool for the insertional mutagenesis of plant genes essential for biological processes of agronomic importance.


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