Rapid genomic changes in polyploid wheat and related species: implications for genome evolution and genetic improvement

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dc.contributor.author Kimatu, Josphert N.
dc.contributor.author Liua, Bao
dc.contributor.author Xua, Chunming
dc.contributor.author Zhaoa, Na
dc.contributor.author Qia, Bao
dc.contributor.author Panga, Jinsong
dc.contributor.author Han, Fangpu
dc.date.accessioned 2014-11-20T09:55:33Z
dc.date.available 2014-11-20T09:55:33Z
dc.date.issued 2009-09
dc.identifier.citation Journal of Genetics and Genomics Volume 36, Issue 9, September 2009, Pages 519–528 en_US
dc.identifier.uri http://cast.org.cn/n35081/n11219166/n11219195/n11219339/n11539794.files/n11540914.pdf
dc.identifier.uri http://hdl.handle.net/123456789/100
dc.description doi:10.1016/S1673-8527(08)60143-5 en_US
dc.description.abstract A polyploid organism by possessing more than two sets of chromosomes from one species (autopolyploidy) or two or more species (allopolyploidy) is known to have evolutionary advantages. However, by what means a polyploid accommodates increased genetic dosage or divergent genomes (allopolyploidy) in one cell nucleus and cytoplasm constitutes an enormous challenge. Recent years have witnessed efforts and progress in exploring the possible mechanisms by which these seemingly intangible hurdles of polyploidy may be ameliorated or eventually overcome. In particular, the documentation of rapid and extensive non-Mendelian genetic and epigenetic changes that often accompany nascent polyploidy is revealing: the resulting non-additive and novel gene expression at global, regional and local levels, and timely restoration of meiotic chromosomal behavior towards bivalent pairing and disomic inheritance may ensure rapid establishment and stabilization as well as its long-term evolutionary success. Further elucidation on these novel mechanisms underpinning polyploidy will promote our understanding on fundamental issues in evolutionary biology and in our manipulation capacities in future genetic improvement of important crops that are currently polyploids in genomic constitution. This review is intended to provide an updated discussion on these interesting and important issues within the scope of a specific yet one of the most important plant groups—polyploid wheat and its related species. en_US
dc.language.iso en en_US
dc.publisher Elsevier Ltd en_US
dc.subject polyploidy en_US
dc.subject non-Mendelian mechanism en_US
dc.subject epigenetics en_US
dc.subject genome evolution en_US
dc.title Rapid genomic changes in polyploid wheat and related species: implications for genome evolution and genetic improvement en_US
dc.type Article en_US

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