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Polyploidy, or whole-genome duplication (WGD), is a key driver of biodiversity, significantly impacting genome structure, organization, and evolution. Once thought to be a speciation process limited to plants, polyploidy is now understood to influence the structure and evolution of most eukaryotic genomes, with the diversity of eukaryotes closely linked to multiple WGDs. This phenomenon creates new genomic interactions, leading to “genomic and transcriptomic shock” that must be resolved in new polyploid lineages. This process acts as a “reset” button, fostering genomic changes that can promote adaptive speciation. The book integrates the conceptual and theoretical foundations of polyploid genome evolution with analyses of patterns and processes in various polyploid groups. While polyploidy is most prevalent in plants, recent research on vertebrates and fungi offers new insights into the factors influencing polyploid speciation and genome formation. The emerging view is that polyploidy, through changes in genome structure and gene regulation, generates genetic and phenotypic novelty observable at chromosomal, physiological, and organismal levels, leading to significant ecological and evolutionary impacts.
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Polyploidy and Genome Evolution, Pamela S. Soltis
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- Année de publication
- 2014
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- (souple)
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