多倍体在植物进化中的意义

几乎所有的开花作物都为多倍体植物,其基因组至少经历1次以上的全基因组加倍事件.随着测序技术的不断革新,人们对作物的基因组以及基因组的演化历史有了全新认识.分析了全基因组加倍在物种进化中的意义:多倍化改变基因组结构,丰富物种的遗传多样性,改变重复基因表达模式,增强物种的适应性,并展望多倍化在作物遗传育种中的应用.

Significance of polyploidy evolutionary in flowering plants

Almost all flowering crops were polyploids plants, which whole genome had exprienced at least a time duplication events at an ancient time. With sequencing technology developing, the knowledge about crop genome and genome evolution had been renewed. In this paper, we reviewed some achievements acquired in polyploidy evolution and discuss the relationship between whole genome duplication and biological evolution. Whole genome duplication could increase the allele number, heterogeneity and diversity in polyploidy species. Meanwhile, doubled genome also made polyploidy plants to have more plasticity adapting to environment changes. At last, we discussed the possible application of duplication event in crop improvement.