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Abstract In an attempt to identify a specific marker for biotype 2 of the Asian rice gall midge (Orseolia oryzae, Wood-Mason), we used AFLP (amplified fragment length polymorphism) fingerprinting. We identified an AFLP marker that is specifically amplified in biotypes 1, 2 and 5 of the rice gall midge, but not in biotype 4. Biotypes 1, 2 and 5 are avirulent to hosts bearing the Gm2 resistance gene...
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