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中国农学通报 ›› 2005, Vol. 21 ›› Issue (7): 341-341.

所属专题: 水稻

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水稻抗稻瘟病的遗传与育种研究进展

梁曼玲   

  • 出版日期:2005-07-05 发布日期:2005-07-05

Review of Researches on Inheritance and Breeding of Blast resistance in Rice

Liang Manling   

  • Online:2005-07-05 Published:2005-07-05

摘要: 稻瘟病是影响水稻生产的主要病害之一,生产上对稻瘟病的防治没有特效的方法,更多依赖水稻品种自身的抗性来抵御病害的发生。因此,稻瘟病抗性的遗传和育种研究就具有十分重大的意义。在稻瘟病抗性遗传研究方面,到目前已经鉴定和定位了40多个抗稻瘟病基因,克隆了2个稻瘟病抗性基因Pi-b和Pi-ta。培育抗稻瘟病的水稻品种可采用如下策略:广泛收集稻瘟病抗源,经过稻瘟病老重病区长期自然选择得到的高抗材料和含有已定位抗性基因的抗源材料要作为重点抗源亲本;检测稻瘟病菌群体结构的变化,获取小种变化的准确信息;常规的有性杂交和转基因技术相结合导入抗性基因;人工接种抗性鉴定、分子标记辅助选择和病区病圃抗性鉴定技术相结合,提高杂交后代材料抗性鉴定的准确性,加快育种进程。

Abstract: Blast is one of the major diseases, which affect rice production. There seems no specially effective way to control the disease in production, but more often, it depends on the resistibility in the rice itself to limit the epidemic of blast. Therefore, it is significant to conduct the studies on inheritance and breeding of blast resistance in rice. At present there are more than 40 blast resistant genes, which are tested and positioned, and 2 blast resistant genes i.e. Pi-b and Pi-ta, which are cloned. The following strategies can be adopted in breeding for blast resistant rice varieties: extensively collect blast resistant germplasm; the highly resistant materials which have been selected naturally in the seriously blast-diseased areas and the resistant materials with resistant genes positioned can be used as key parental lines; observe the change in the structure of blast pathogenic populations so as to gain exact information related to the change of races; transfer some resistant genes through the combination of conventional sexual hybridization with trans-gene technology; combine the artificial inoculation, molecular marker and on-diseased-nursery test together for elevating the accuracy in the testing of the resistibility in the progenies of a hybrid as well as for accelerating the breeding progress.