摘要
多倍体化在高等生物进化中发挥重要的作用。作为一种基因组压力,它在生物体上产生短期效应和长期效应,表现为基因组结构的不稳定性和基因表达变化以及和适应性有关的新表型,促进了多倍体物种形成和进化成功。高等生物进化的历史经历着从二倍体到多倍体的突然变化和从多倍体到二倍体的缓慢转变,多倍体化诱导的短期效应和长期效应给予生物体基因组的以及功能的可塑性,因而具有重要的意义。
Polyploidy is a prominent force in the evolution of higher organisms.As a genomic stress,it bestow short-term and long-term effects on the organisms,including instability of genomic structure and alterations in gene expression as well as phenotypic novelty associated with adaptation,contributing to success speciation and evolutionary.Higher organisms have undergone the sudden transition from diploidy to polyploidy and the gradual transition from polyploidy to diploidy in the evolutionary history.Understanding these effects induced by polyploidy assumes significance when it is considered that they confer organisms genomic and functional plasticity.
关键词
多倍体
基因组变化
短期效应
长期效应
进化
polyploidy
genomic changes
short-term effects
long-term effects
evolution
