Recombination is a significant cause of maize mitochondrial gene mutations. Chimeric genes are often found in the mitochondria of cytoplasmic male-sterile maize. They are created by rearrangements involving intramolecular and intermolecular recombination. Herein we describe the effect of rearrangements on the chromosomal location, flanking and coding regions of several maize mitochondrial genes.La recombinaison est une cause importante de mutation des gknes mitochondriaux chez le mays. Des gknes chimkriques sont souvent dkcelis dans les mitochondries de mays mble-stiriles d'origine cytoplasmique. Ces gknes sont formis par des riarrangements impliquant des recombinaisons intramoliculaires et intermolkculaires. La prksente communication comporte une description des effets des rkarrangements sur la localisation chromosomique des rkgions de flancs et de codage des gknes mitochondriaux de nombreux mais.
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