论文部分内容阅读
用两套鉴别品种,即中国鉴定品种和日本的清泽品种,对丹东地区水稻瘟病菌小种进行鉴定。用中国品种把80个单孢分离菌分成12个小种,用清泽品种将83个单孢分离菌分出成34个小种。当地优势小种是日本的307小种和中国的ZF_1小种。在丹东现在明确了病菌侵染的抗病基因是Pi—ta~2。高抗又高产的品种中花8号和中花9号,对多数小种是高抗的,但对日本小种577.3和577.7易感染。这两个小种在丹东地区出现的频率较低,因此中花8号和中花9号这两个品种在1—2年之内,不会丧失抗性。
The identification of the race of rice blast germ in Dandong was carried out using two sets of identification cultivars, namely Chinese identified varieties and Japanese cultivars. Eighty single spore isolates were divided into 12 races with Chinese cultivars, and 83 pollen isolates were separated into 34 races with Qingze cultivars. The local races are Japan’s 307 races and China’s ZF_1 races. In Dandong, it is now clear that the disease-resistant gene for pathogen infection is Pi-ta ~ 2. High resistant and high yielding varieties Zhonghua 8 and Zhonghua 9 were highly resistant to most races but were susceptible to Japanese races 577.3 and 577.7. These two races appear less frequently in Dandong, so the two varieties Zhonghua 8 and Zhonghua 9 will not lose their resistance within 1-2 years.