Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (6): 117-122.doi: 10.11924/j.issn.1000-6850.casb2020-0129

Special Issue: 油料作物 园艺 农业生态

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Cultivated Oilseed Rape Varieties: Resistance to Sclerotinia Stem Rot in Sichuan Basin

Xian Yunxi1(), Zhang Lei1,2, Yang Xiaoxiang1,2, Liu Yong1,2, Xiang Yunjia1, Zhou Xiquan1, Huang Xiaoqin1,2()   

  1. 1Institute of Plant Protection, Sichuan Academy of Agricultural Sciences, Chengdu 610066
    2Key Laboratory of Integrated Pest Management on Crops in Southwest, Ministry of Agriculture and Rural Affairs, Chengdu 610066
  • Received:2020-05-26 Revised:2020-07-27 Online:2021-02-25 Published:2021-02-24
  • Contact: Huang Xiaoqin E-mail:13550541945@163.com;hxqin1012@163.com

Abstract:

The aims are to monitor and evaluate the resistance of rapeseed varieties to Sclerotinia stem rot in Sichuan Basin, and provide reference for rational application of rapeseed varieties. In 2018 and 2019, 31 rapeseed varieties were inoculated with Sclerotinia sclerotiorum by artificial mycelium inoculation method in field, the incidence of stem and branch pod of rape was investigated, and the resistance of each variety to Sclerotinia stem rot was evaluated. The results showed that, 21 varieties had stable resistance, in other words, they showed the same resistance in the two years. Among them, ‘Dehongyou 1’ was highly resistant to Sclerotinia stem rot, ‘Demingyou 100’ and ‘Keleyou 998’ were moderately resistant to Sclerotinia stem rot, and 10 varieties such as ‘Keyuanyou 2’ and ‘Yiyou 17’ were low resistant to Sclerotinia stem rot. Eight varieties such as ‘Youyan 11’ and ‘Deyou No. 5’ were low susceptible to Sclerotinia stem rot. The resistance to Sclerotinia stem rot of 10 varieties such as ‘Deyou 9’ and ‘Yiyou 19’ was unstable or lost. In conclusion, ‘Dehongyou 1’, ‘Demingyou 100’ and ‘Keleyou 998’ can be used as parents for disease resistance breeding or for disease prevention and control.

Key words: oilseed rape, Sclerotinia stem rot, resistance monitoring, Sichuan Basin

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