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Genome evolution in allopolyploid wheat—a revolutionary reprogramming followed by gradual changes 被引量：8

Genome evolution in allopolyploid wheat—a revolutionary reprogramming followed by gradual changes
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摘要 Allopolyploidy accelerates genome evolution in wheat in two ways： 1） allopolyploidization triggers rapid genome alterations （revolutionary changes） through the instantaneous generation of a variety of cardinal genetic and epigenetic changes, and 2） the allopolyploid condition facilitates sporadic genomic changes during the life of the species （evolutionary changes） that are not attainable at the diploid level. The revolutionary alterations, occurring during the formation of the allopolyploid and leading to rapid cytological and genetic diploidization, facilitate the successful establishment of the newly formed allopolyploid in nature. On the other hand, the evolutionary changes, occurring during the life of the allopolyploids, increase the intra-specific genetic diversity, and consequently, increased fimess, adaptability and competitiveness. These phenomena, emphasizing the dynamic plasticity of the allopolyploid wheat genome with regards to both structure and function, are described and discussed in this review. Allopolyploidy accelerates genome evolution in wheat in two ways： 1） allopolyploidization triggers rapid genome alterations （revolutionary changes） through the instantaneous generation of a variety of cardinal genetic and epigenetic changes, and 2） the allopolyploid condition facilitates sporadic genomic changes during the life of the species （evolutionary changes） that are not attainable at the diploid level. The revolutionary alterations, occurring during the formation of the allopolyploid and leading to rapid cytological and genetic diploidization, facilitate the successful establishment of the newly formed allopolyploid in nature. On the other hand, the evolutionary changes, occurring during the life of the allopolyploids, increase the intra-specific genetic diversity, and consequently, increased fimess, adaptability and competitiveness. These phenomena, emphasizing the dynamic plasticity of the allopolyploid wheat genome with regards to both structure and function, are described and discussed in this review.
作者 Moshe Feldman Avraham A. Levy
机构地区 Plant Sciences
出处 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2009年第9期511-518,共8页 遗传学报（英文版）
关键词 ALLOPOLYPLOIDIZATION cytological diploidization EPIGENETICS genetic diploidizafion TRITICUM wheat allopolyploidization cytological diploidization epigenetics genetic diploidizafion Triticum wheat
分类号 S512.1 [农业科学—作物学]
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Journal of Genetics and Genomics
2009年 第9期

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