Model for the evolution of the Romani element in the T. monococcum and T. turgidum H1 haplotypes. The complete Romani retrotransposon is indicated by rectangles comprising two LTR (dark-gray boxes) and internal sequences (white box). The same Romani element is at the origin of the solo-LTR in the T. monococcum sequence resulting from an unequal intra-element recombination event and at the origin of the nested complex in T. turgidum.