Epigenetic Programming： The Challenge to Species Hybridization  

作　　者：Ryo Ishikawa Tetsu Kinoshita 

机构地区：[1]Plant Reproductive Genetics, GCOE Research Group, Graduate School of Biological Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma,Nara, 630-0192, Japan

出　　处：《Molecular Plant》2009年第4期589-599,共11页分子植物（英文版）

摘　　要：In many organisms, the genomes of individual species are isolated by a range of reproductive barriers that act before or after fertilization. Successful mating between species results in the presence of different genomes within a cell （hybridization）, which can lead to incompatibility in cellular events due to adverse genetic interactions. In addition to such genetic interactions, recent studies have shown that the epigenetic control of the genome, silencing of transposons, control of non-additive gene expression and genomic imprinting might also contribute to reproductive barriers in plant and animal species. These genetic and epigenetic mechanisms play a significant role in the prevention of gene flow between species. In this review, we focus on aspects of epigenetic control related to hybrid incompatibility during species hybrid- ization, and also consider key mechanism（s） in the interaction between different genomes.In many organisms, the genomes of individual species are isolated by a range of reproductive barriers that act before or after fertilization. Successful mating between species results in the presence of different genomes within a cell （hybridization）, which can lead to incompatibility in cellular events due to adverse genetic interactions. In addition to such genetic interactions, recent studies have shown that the epigenetic control of the genome, silencing of transposons, control of non-additive gene expression and genomic imprinting might also contribute to reproductive barriers in plant and animal species. These genetic and epigenetic mechanisms play a significant role in the prevention of gene flow between species. In this review, we focus on aspects of epigenetic control related to hybrid incompatibility during species hybrid- ization, and also consider key mechanism（s） in the interaction between different genomes.

关 键 词：ENDOSPERM EPIGENETICS genomic imprinting species hybridization transposon. 

分 类 号：S937[农业科学—渔业资源] TP311[农业科学—水产科学]