Tuareg, a novel miniature-inverted repeat family of pearl millet (Pennisetum glaucum) related to the PIF superfamily of maize |
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Authors: | Marie-Stanislas Remigereau Odile Robin Sonia Siljak-Yakovlev Aboubakry Sarr Thierry Robert Thierry Langin |
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Institution: | (1) Institut de Biotechnologies des Plantes (UMR 8618), Université Paris-Sud, Bat.630, 91405 Orsay Cedex, France;(2) Ecologie, Systématique et Evolution (UPRESA 8079), Université Paris-Sud XI, Orsay, France;(3) Present address: Smurfit Institute of Genetics, Trinity College, Dublin 2, Ireland |
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Abstract: | Miniature-inverted repeat transposable elements (MITEs) are abundantly repeated in plant genomes and are especially found
in genic regions where they could contribute regulatory elements for gene expression. We describe with molecular and cytological
tools the first MITE family reported in pearl millet: Tuareg. It was initially detected in the pearl millet ortholog of Teosinte-branched1, an important developmental gene involved in the domestication of maize. The Tuareg family was amplified recently in the pearl millet genome and elements were found more abundant in wild than in domesticated
plants. We found that they shared similarity in their terminal repeats with the previously described mPIF MITEs and that they are also present in other Pennisetum species, in maize and more distantly related grasses. The Tuareg family may be part of MITEs activated by PIF-like transposases and it could have been mobile since pearl millet domestication.
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O. Robin contributed the FISH and fiber-FISH hybridizations. |
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Keywords: | MITE pearl millet P-instability factor transposon Tuareg |
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