摘要
为明确成都平原地区主栽大白菜品种对根肿病的抗性情况,于2018年分别在成都市新都区、彭州市和崇州市3个试验田块对45个大白菜主栽品种采用田间抗鉴圃自然感染诱发法进行根肿病抗性鉴定,通过调查根部根肿病发病程度评价各品种的抗性。结果表明,在崇州自然病圃中表现为免疫的品种有4个,占总品种的8.9%;其余品种均表现为感病或高感,占比91.1%。彭州的结果显示,在所测定的45个品种中,免疫品种有6个;耐病品种有11个;剩余28个品种为感病或高感品种。而在新都发病田块中,只有2个品种表现为对根肿病免疫,16个品种表现为耐病,27个品种表现为感病或高感。部分品种在不同地区抗性结果表现不一致,试验鉴定到2个对根肿病免疫的优异品种,可为选育和应用抗性品种提供借鉴。
To clarify the resistance level of Chinese cabbage varieties against clubroot in Chengdu plain,a total of 45 main cultivars of Chinese cabbage were screened for resistance in three counties,Longxing in Chongzhou,Mengyang in Pengzhou and Taixing in Xindu in 2018.The identification was carried out under field condition by using the method of natural infection,and the resistance level analysis was conducted by investigating the symptom on plant roots.The results showed that the resistance level of the tested Chinese cabbage cultivars to clubroot disease was variable.Four cultivars showed immune to clubroot(disease index=0)in the Chongzhou natural disease nursery,and the ratio was 8.9%,and the other cultivars showed susceptibility(35<disease index≤55)or high susceptibility(55<disease index≤100),accounting for 91.1%.The evaluation of resistance identification in Pengzhou showed that six cultivars were immune to clubroot,eleven cultivars were tolerant to clubroot disease(15<disease index≤35),and the remaining twenty eight cultivars were susceptibility or highly susceptibility.But in Xindu,only two cultivars showed immune resistance,sixteen tolerant cultivars were screened out and twenty six cultivars showed susceptibility or high susceptibility.The resistance of most of the cultivars was susceptible to clubroot,and the resistance of some cultivars showed instability in different areas.Only cultivar Meichun and Shangpin exhibited stable immune to clubroot in the three regions,which were suitable for planting in the epidemic areas of clubroot disease,and could be used for further study on resistance breeding.
作者
伍文宪
张蕾
黄小琴
杨潇湘
刘勇
Wu Wenxian;Zhang Lei;Huang Xiaoqin;Yang Xiaoxiang;Liu Yong(Institute of Plant Protection,Sichuan Academy of Agricultural Sciences,Chengdu 610066;Key Laboratory of Integrated Pest Management in Southwest Agriculture Crops of Ministry of Agriculture,Chengdu 610066)
出处
《中国农学通报》
2020年第10期127-132,共6页
Chinese Agricultural Science Bulletin
基金
四川省创新能力提升工程“油菜响应芸薹根肿菌侵染的差异蛋白研究”(2016QNJJ-010)
四川省科技支撑计划“土传病害轻简化防控重大关键技术研究与示范”(2014NZ0042).
关键词
大白菜
根肿病
抗性水平
病情指数
Chinese cabbage
clubroot
resistance level
disease index
