植物抗病基因的进化  

The Evolution of Plant Disease Resistance Gene

作　　者：庄军[1] 刘志昕[1] 

机构地区：[1]中国热带农业科学院热带作物生物技术国家重点实验室,海口571101

出　　处：《遗传》2004年第6期962-968,共7页Hereditas（Beijing)

摘　　要：植物抗病基因在进化中形成了几种共有的进化形式。植物祖先抗病基因的复制创造了新基因座。基因间和基因内重组导致了变异 ,也导致了新特异性抗病基因的产生。另外 ,与特异性识别相关的富含亮氨酸重复区顺应于适应性选择。同样 ,类转座元件在抗病基因座中的插入加速了抗病基因的进化。随着抗病基因的进化 ,抗病反应也呈现出多样化 。The evolution of plant disease resistance genes has shaped in some kinds of common forms.The duplication of plant progenitor disease resistance gene creates disease resistance gene loci. The intragenic and extragenic recombination results in variation.Recombination also is involved in generation novel resistance specificities.In addition,the leucine-rich repeats (LRRs) involved in recognitional specificity are subject to adaptive selection.Insertion of transposable elements into several resistance gene loci result in further evolution of resistance genes.With the evolution of plant disease resistance genes,the R genes (resistance genes)-mediated response shows diversification which represents different stages in the oscillating evolution between plants and their pathogens.

关 键 词：富含亮氨酸重复区 复制 重组 类转座元件 过敏性反应 

分 类 号：S432.23[农业科学—植物病理学]