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We identified a MITE transposon in the Brassica rapa genome,BRATA1,which showed a high percentage of sequence similarity to ATTIRTA1 of Arabidopsis thaliana.Through in silico mapping,a total of 592 BRATA1 terminal inverted repeat sequences were found to be distributed evenly across the genome.About 10 percent of the transposons are located in introns of genes only and not in exons.Using BRATA1,a display system was developed based on a modification of the AFLP technique and was applied to analyze the genetic diversity of the Brassica rapa collection from the Korean Genebank.