抗根肿病大白菜品种对不同地区根肿病菌的抗性鉴定

采用菌液注射法,以来源于山东青岛、云南双龙和陕西太白的大白菜根肿病菌为病原菌,对49个抗根肿病大白菜品种进行人工接种抗病性鉴定。结果表明:参试49个大白菜品种对3个地区根肿病菌存在抗性差异,其中32个品种对山东青岛根肿病菌和陕西太白根肿病菌抗性表现基本一致,推测这两地的生理小种一致;云南双龙根肿病菌与山东青岛、陕西太白根肿病菌为明显不同的生理小种,且致病力强、抗源少。

Identification of ClubrootResistant Varieties of Chinese Cabbage to Plasmodiophora brassicae from Different Regions

Plasmodiophora brassicae of Chinese cabbage from Qingdao in Shandong Province，Shuanglong in Yunnan Province，and Taibai in Shaanxi Province were innoculated to 49 Clubroot Resistant（CR）Chinese cabbage varieties to carry out identification．The results showed that the Chinese cabbage varieties’ resistances to Plasmodiophora brassicae from 3 above locations were different．32 varieties had the same resistance to Plasmodiophora brassicae from Qingdao in Shandong Province，and Taibai in Shaanxi Province．We speculated that the physiological races from these 2 locations were the same．Plasmodiophora brassicae from Shuanglong in Yunnan Province was physiological race distinctively different from that of Qingdao in Shandong Province and Taibai in Shaanxi Province．Plasmodiophora brassicae from Shuanglong in Yunnan Province had strong pathogenicity，and less resistant resource．