海南省部分水稻品种对稻瘟病菌22个株系的抗瘟性鉴定

为有效利用抗瘟品种控制稻瘟病的大发生，掌握水稻品种的抗瘟性。本研究采用五叶期水稻离体叶片研究了36个水稻品种对22个株系稻瘟病菌的抗性，有21个水稻品种表现抗病，其它15个品种感病。在此基础上对其中有代表性的4个水稻品种进行了抗瘟生化机制的初步研究。生化测定结果表明，接种RB22菌株后，各抗感品种中各种生化因子大部分具有明显差异，且具有一定的规律性。该结果对于培育新的抗瘟水稻品种、布局水稻不同抗瘟基因型品种和治理稻瘟病的流行具有一定意义。

Identification of Blast Resistanee of Different Rice Varieties to Magnaporthe Grisea of 22 strains in Hainan Province

In order to effectively control the prevalence of rice blast disease by using resistant rice varieties and get the blast resistance of rice types, we used the five-leaf stage of rice leaves to identify the blast resistance of 36 rice varieties to Magnaporthe grisea of 22 strains. 21 rice varieties demonstrated resistance to the rice blast fungus of 22 strains, and the remaining 15 species were susceptible. Four of the 36 rice varieties, biochemical mechanisms of rice blast resistance were studied on this basis. Biochemical results showed that after inoculation, most of a varieties of biochemical factors of all resistant and susceptible cultivars had significantly differences, and had a certain regularity. The results had a guiding significance to the breeding of resistance varieties, to the arrangement of different resistance varieties and to the control of prevalence of rice blast.