Polyploidy and genome evolution in plants

Genome doubling (polyploidy) has been and continues to be a pervasive force in plant evolution. Modern plant genomes harbor evidence of multiple rounds of past polyploidization events, often followed by massive silencing and elimination of duplicated genes. Recent studies have refined our inferences...

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Bibliographic Details
Published in:Current opinion in plant biology 2005-04, Vol.8 (2), p.135-141
Main Authors: Adams, Keith L, Wendel, Jonathan F
Format: Article
Language:English
Subjects:
evolution
Evolution, Molecular
Gene Deletion
gene duplication
Gene Expression Regulation, Plant
genome
Genome, Plant
literature reviews
Magnoliopsida - classification
Magnoliopsida - genetics
plant genetics
plants
Plants - genetics
Polyploidy
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Summary:Genome doubling (polyploidy) has been and continues to be a pervasive force in plant evolution. Modern plant genomes harbor evidence of multiple rounds of past polyploidization events, often followed by massive silencing and elimination of duplicated genes. Recent studies have refined our inferences of the number and timing of polyploidy events and the impact of these events on genome structure. Many polyploids experience extensive and rapid genomic alterations, some arising with the onset of polyploidy. Survivorship of duplicated genes are differential across gene classes, with some duplicate genes more prone to retention than others. Recent theory is now supported by evidence showing that genes that are retained in duplicate typically diversify in function or undergo subfunctionalization. Polyploidy has extensive effects on gene expression, with gene silencing accompanying polyploid formation and continuing over evolutionary time.
ISSN:1369-5266
1879-0356
DOI:10.1016/j.pbi.2005.01.001