Advent of a new retrotransposon structure: the long form of the Veju elements.
Transposable elements are the main component of plant genomes, especially in grass species. In a previous analysis, we have identified two unusual types of Class I elements, two homologous Veju TRIM elements, but with an unusual long structure. They are formed by the junction of a yet unidentified segment labelled unknown DNA, flanked by the borders of the classical Veju element. Here, we show that the long (Veju_L) and the short forms (Veju_S) coexist within wheat genomes. The associated unknown DNA had always the same origin, and the Veju_L came probably from either illegitimate recombinations or 'template switching' between the Veju_S and another unique unknown DNA sequence. This junction then evolved differently within wheat genomes.
Sabot
François
F
UMR INRA/UBP 1095 Amélioration & Santé des Plantes, 234 Avenue du Brézet, F-63100 Clermont-Ferrand, France. michel.bernard@clermont.inra.fr
Sourdille
Pierre
P
Bernard
Michel
M
D001483:Base Sequence; D022202:Chromosomes, Artificial, Bacterial / Q000235:genetics; D003001:Cloning, Molecular; D018744:DNA, Plant / Q000235:genetics*; D018745:Genome, Plant; D008957:Models, Genetic; D008969:Molecular Sequence Data; D010802:Phylogeny; D006109:Poaceae / Q000235:genetics*; D011123:Polyploidy; D011995:Recombination, Genetic; D018626:Retroelements / Q000235:genetics*; D012689:Sequence Homology, Nucleic Acid; D014908:Triticum / Q000235:genetics*
D018744:DNA, Plant; D018626:Retroelements