水稻抗白叶枯病基因及其抗病机理的研究进展

Prospects for Resistance Genes against Bacterial Blight of Rice and Their Mechanism of Disease Resistance

水稻白叶枯病是由Xanthomonasoryzaepv．oryzae致病菌引起的全球性水稻病害。到目前为止,已有26个抗病基因被发现,有10个基因已在染色体上被定位,包括显性基因Xa1、Xa4、Xa21andXa26(t)等和隐性基因Xa5、Xa13等。对大部分抗病基因的抗病机制了解还不是很清楚。利用标记辅助选择(MAS)进行抗病育种是防治白叶枯病的有效途径。在此,综述了已发现的抗水稻白叶枯病基因的种类、分子标记、抗病机制和在抗病育种中的应用。

The bacterial blight of rice is caused by the phytopathogenic bacterium Xanthomonas oryzae pv. oryzae （Xoo）. The disease limits the rice yield worldwide. As many as 26 resistant （R） genes have been identified with only a few cloned and characterized. This review discusses the various bacterial blight resistance genes which are identified and their uses in marker assisted selection in rice breeding.