Morgane, a new LTR retrotransposon group, and its subfamilies in wheats.
Transposable elements are the main components of grass genomes, especially in Triticeae species. In a previous analysis, we identified a very short element, Morgane_CR626934-1; here we describe more precisely this unusual element. Morgane_CR626934-1 shows high sequence identity (until 98%) with ESTs belonging to other possible small elements, expressed under abiotic and biotic stress conditions. No putative functional polyprotein could be identified in all of these different Morgane-like sequences. Moreover, elements from the Morgane_CR626934-1 subfamily are found only in wheats and Agropyrum genomes and among these species, only Ae. tauschii and T. aestivum present a high copy number of these elements. They are highly conserved in wheat genomes (95.5%). Based on the uncommon characteristics of the described Morgane-like elements, we proposed to classify them in a new group within the Class I LTR retrotransposon, the Morgane group.
Sabot
François
F
UMR INRA/UBP 1095 Amélioration & Santé des Plantes, 234 Avenue du Brézet, F-63039, Clermont-Ferrand Cedex, France.
Sourdille
Pierre
P
Chantret
Nathalie
N
Bernard
Michel
M
D001483:Base Sequence; D018744:DNA, Plant / Q000235:genetics*; D019143:Evolution, Molecular; D020224:Expressed Sequence Tags; D018745:Genome, Plant; D008957:Models, Genetic; D008969:Molecular Sequence Data; D006109:Poaceae / Q000145:classification / Q000235:genetics; D011123:Polyploidy; D018626:Retroelements / Q000235:genetics*; D012689:Sequence Homology, Nucleic Acid; D020079:Terminal Repeat Sequences; D014908:Triticum / Q000145:classification / Q000235:genetics*
D018744:DNA, Plant; D018626:Retroelements