Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (1): 122-130.doi: 10.11924/j.issn.1000-6850.casb20190800529

Special Issue: 油料作物 园艺 农业生态

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Rapeseed Variety in Southwest China: Clubroot Resistance and Planting Layout

Huang Xiaoqin1,2, Zhang Lei1,2, Yang Xiaoxiang1,2, Wu Wenxian1,2, Zhou Xiquan1,2, Liu Yong1,2()   

  1. 1 Institute of Plant Protection, Sichuan Academy of Agricultural Sciences, Chengdu 610066;
    2 Key Laboratory of Integrated Pest Management in Southwest Agriculture Crops, Ministry of Agriculture and Rural Affairs, Chengdu 610066
  • Received:2019-08-12 Revised:2019-10-21 Online:2020-01-05 Published:2020-01-07
  • Contact: Liu Yong E-mail:liuyongdr@163.com

Abstract:

The paper aims to determine the clubroot resistance of rapeseed varieties in southwest China, so as to provide references for reasonable variety planting layout and to reduce the damage and losses caused by clubroot. Combined with identification of physiological races of Plasmodiophora brassicae, we evaluated 80 rapeseed varieties’ resistance to clubroot in Anxian, Dayi and Guanghan of Sichuan by the method of natural morbidity investigation in the nursery, and monitored 22 varieties of rapeseed 3 consecutive years. The results showed that: the Plasmodiophora brassicae from disease nursery belonged to pathotype 4 with genetic differentiation; no rapeseed variety was immune to clubroot and the susceptible rapeseed variety accounted for 88.75%, 83.75% and 87.50%, respectively, in Anxian, Dayi and Guanghan, among them, there were 55 susceptible rapeseed varieties in the 3 disease nurseries, namely, these rapeseed varieties were not suitable for planting in the physiological race area of pathotype 4. Resistance tracking evaluation showed that the resistance stability of the varieties varied. In conclusion, ‘Zheyou 50’ and ‘You guanguan’ are suitable for planting in Anxian, ‘Huang jinjia’, ‘Jin you 858’, ‘You yan 9’, ‘Zhong duyou 998’ and ‘Yu huangyou 4’ are suitable for planting in Dayi, ‘Zhi yuanyou 8’ is suitable for planting in Guanghan; ‘Mian fengyou 5’ and ‘De mingyou 1’ show a tendency of losing resistance, the resistance of ‘Feng youjing’ and ‘Gao you 48’ is unstable and the resistance of ‘Ai jiazao’ is completely lost.

Key words: rapeseed, Plasmodiophora brassicae, clubroot, resistant evaluation, variety planting layout

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