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Presence and absence of LTR-retrotransposons in the AA-genome variety populations. (A) Elements investigated by PCR and their distribution in the three sequenced Orp regions. (B) The presence (red or green) or absence (grey) of individual LTR-retrotransposons detected by amplification of retrotransposon junctions. Varieties from top to bottom are listed in the same orders as shown in Additional file 2, Table S2.
