Rarely successful polyploids and their legacy in plant genomes - PubMed (original) (raw)
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Rarely successful polyploids and their legacy in plant genomes
Nils Arrigo et al. Curr Opin Plant Biol. 2012 Apr.
Abstract
Polyploidy, or whole genome duplication, is recognized as an important feature of eukaryotic genome evolution. Among eukaryotes, polyploidy has probably had the largest evolutionary impact on vascular plants where many contemporary species are of recent polyploid origin. Genomic analyses have uncovered evidence of at least one round of polyploidy in the ancestry of most plants, fueling speculation that genome duplications lead to increases in net diversity. In spite of the frequency of ancient polyploidy, recent analyses have found that recently formed polyploid species have higher extinction rates than their diploid relatives. These results suggest that despite leaving a substantial legacy in plant genomes, only rare polyploids survive over the long term and most are evolutionary dead-ends.
Copyright © 2012 Elsevier Ltd. All rights reserved.
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