Novel patterns of gene expression in polyploid plants
Novel patterns of gene expression in polyploid plants
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DOI：
10.1016/j.tig.2005.07.009
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发表时间：
2005-10-01
影响因子：
11.4
通讯作者：
Wendel, JF
中科院分区：
文献类型：
--
作者：
Adams, KL;Wendel, JF
基因组加倍或多倍性是在大多数真核生物基因组中发现的重复基因的主要因素。多倍性对重复基因表达具有相当大的影响，包括重复基因之一的沉默和上调或下调。这些变化可以在多倍体化开始时或在多倍体形成后的几代内发生，并且它们可以具有表观遗传因果因素。许多表达改变是器官特异性的。在多倍化过程中，特定的基因可以独立地和重复地沉默，而其他基因的模式似乎更随机。最近的三个报告提供了有趣的新见解的模式，时间和机制的基因表达变化，伴随着植物的多倍性。
Genome doubling, or polyploidy, is a major factor accounting for duplicate genes found in most eukaryotic genomes. Polyploidy has considerable effects on duplicate gene expression, including silencing and up- or downregulation of one of the duplicated genes. These changes can arise with the onset of polyploidization or within several generations after polyploid formation and they can have epigenetic causal factors. Many expression alterations are organ-specific. Specific genes can be independently and repeatedly silenced during polyploidization, whereas patterns for other genes appear to be more stochastic. Three recent reports have provided intriguing new insights into the patterns, timing and mechanisms of gene expression changes that accompany polyploidy in plants.