Abstract
Molecular mechanisms governing plant genome reorganization in the course of allopolyploidization are reviewed. The special role of early genetic changes, which were studied using a unique model of synthetic allopolyploids, is emphasized. The data on various genomic changes at early stages of allopolyploidization, including the activation of mobile elements, chromosomal rearrangements, epigenetic and transcriptomic changes, etc., are summarized. We note that these changes provide for the evolutionary success of allopolyploids and their prevalence among higher plants because of the formation of a stable organization of the allopolyploid genome.
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