Genomic and expression plasticity of polyploidy.

Genomic and expression plasticity of polyploidy.
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DOI:
10.1016/j.pbi.2009.11.004
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发表时间:
2010-04
影响因子:
9.5
通讯作者:
Chen ZJ
Chen ZJ
中科院分区:
生物学2区
文献类型:
--
作者:
Jackson S;Chen ZJ

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多倍体或全基因组复制(WGD)发生在许多植物和一些动物的进化史上,包括小麦、棉花和甘蔗等作物。最近的研究表明,植物多倍体的基因组结构和基因表达发生了快速和动态的变化,这反映了植物中重复基因和基因组的基因组和功能可塑性。许多多倍体中响应生长、发育和逆境的调控途径中单亲基因调控和非加性基因表达的共同特征导致了包括染色质修饰和小RNA在内的表观遗传机制在形成分子和表型新颖性方面发挥着核心作用,这些新颖性可以在许多多倍体植物和作物中选择和驯化。
Polyploidy or whole genome duplication (WGD) occurs throughout the evolutionary history of many plants and some animals, including crops such as wheat, cotton, and sugarcane. Recent studies have documented rapid and dynamic changes in genomic structure and gene expression in plant polyploids, which reflects genomic and functional plasticity of duplicate genes and genomes in plants. Common features of uniparental gene regulation and nonadditive gene expression in regulatory pathways responsive to growth, development, and stresses in many polyploids have led to the conclusion that epigenetic mechanisms including chromatin modifications and small RNAs play central roles in shaping molecular and phenotypic novelty that may be selected and domesticated in many polyploid plants and crops.
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