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- Jeff J. Doyle
- L. H. Bailey Hortorium, Department of Plant Biology, Cornell University, Ithaca, New York 14850;
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- Lex E. Flagel
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, Iowa 50011;
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- Andrew H. Paterson
- Plant Genome Mapping Laboratory, University of Georgia, Athens, Georgia 30602;
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- Ryan A. Rapp
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, Iowa 50011;
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- Douglas E. Soltis
- Department of Botany, University of Florida, Gainesville, Florida 32611;
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- Pamela S. Soltis
- Florida Museum of Natural History, University of Florida, Gainesville, Florida 32611;
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- Jonathan F. Wendel
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, Iowa 50011;
説明
<jats:p> Polyploidy is a common mode of evolution in flowering plants. The profound effects of polyploidy on gene expression appear to be caused more by hybridity than by genome doubling. Epigenetic mechanisms underlying genome-wide changes in expression are as yet poorly understood; only methylation has received much study, and its importance varies among polyploids. Genetic diploidization begins with the earliest responses to genome merger and doubling; less is known about chromosomal diploidization. Polyploidy duplicates every gene in the genome, providing the raw material for divergence or partitioning of function in homoeologous copies. Preferential retention or loss of genes occurs in a wide range of taxa, suggesting that there is an underlying set of principles governing the fates of duplicated genes. Further studies are required for general patterns to be elucidated, involving different plant families, kinds of polyploidy, and polyploids of different ages. </jats:p>
収録刊行物
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- Annual Review of Genetics
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Annual Review of Genetics 42 (1), 443-461, 2008-12-01
Annual Reviews