Abstract
The review deals with cytoplasmic male sterility (CMS) in higher plants: impairment of the pollen formation resulting from interaction of the nuclear and mitochondrial genomes. The information on the known nuclear restorer-of-fertility genes and their effects on the expression of CMS-associated mitochondrial loci are considered. Heteroplasmy of mtDNA in plants and its potential association with CMS inheritance, as well as possible mechanisms of the observed direct and reverse association between altered expression of the CMS-inducing mitochondrial genome, metabolic defects, and pollen sterility are discussed.
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