作　　者： ; ;

机构地区： 广东省农业科学院

出　　处： 《植物保护学报》 1998年第2期97-102,共6页

摘　　要： 1991～1995年对广东稻瘟病菌生理小种及部分主栽品种抗性的研究结果表明,广东稻瘟病菌小种分布及发生动态相对稳定,优势种群为ZB群、ZC群;优势小种为ZB13、ZB5、ZC13和ZB1,不同生态稻区优势小种有差异。品种间具有不同的抗性水平,本省育成推广的主栽品种对稻瘟病属中等的抗性水平,个别品种抗性偏低,属于中感至感。粳籼89等的抗病性逐年下降,这些主栽品种抗性丧失的主要原因,一方面是原有小种的致病性发生变化所致,另一方面可能是由于出现了对该品种致病的新小种。 The physiological race of Magnaporthe grisea (Pyricularia grisea) and the resistance of major cultivated rice cultivars in Guangdong from 1991 to 1995 were studied. The results indicated that the change of physiological races of M. grisea was relatively stable in these five years. The races, which infected indica rice, ZA, ZB and ZC were isolated every year. The isolation rate of ZB was over 50% annually. The races infecting japonica rice were ZB and ZC. The dominant races were ZB13, ZB5, ZC13 and ZB1. The combination of these races in different ecological regions was diverse, however. The data of resistance of cultivars indicated that different rice cultivars possessed different resistant level, which was mostly moderate resistant to the blast. The resistance of a main cultivar Jingxian 89 declined over the years for example. The reasons for the cultivars 'lost' the resistance was discussed.

关 键 词： 稻瘟病菌 生理小种 品种抗性 广东

领　　域： [农业科学] [农业科学] [农业科学]