Analysis of heterosis caused by transposition burst of a transposon mPing in rice

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We investigated molecular mechanisms of vigorous phenotype in vigorous growing revertants of a slender glume mutant IM294 in which a transposon mPing is actively transposing. We found that transposition burst of mPing is necessary forthe expression of vigorous phenotype. Moreover, we identified 20 mPing insertions within or near gens in vigorous mutant VGI1. These results documented that transposition burst of transposon greatly contributes in evolution of organisms.