Biotechnology Bulletin ›› 2021, Vol. 37 ›› Issue (4): 47-55.doi: 10.13560/j.cnki.biotech.bull.1985.2020-1514

Previous Articles     Next Articles

Temperature-related Pathogenicity Differentiation of Wheat Head Blight in Huang and Huai River Valleys and Northeast China Wheat Regions

LUO Li-li1,2(), ZHANG Hao2,3, YANG Mei-xin2, WANG Yun-fei2, XU Jing-sheng2, XU Jin2, YAO Qiang1(), FENG Jie2()   

  1. 1. Academy of Agriculture and Forestry Sciences,Qinghai University,Key Laboratory of Agricultural Integrated Pest Management,Qinghai Province,Scientific Observing and Experimental Station of Crop Pest in Xining,Ministry of Agriculture and Rural Affairs,Xining 810016
    2. State Key Laboratory of Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193
    3. National Agricultural Experimental Station for Plant Protection,Ministry of Agriculture and Rural Affairs,Tianshui 741000
  • Received:2020-12-15 Online:2021-04-26 Published:2021-05-13
  • Contact: YAO Qiang,FENG Jie E-mail:1536550780@qq.com;yaoqiang2010@126.com;jfeng@ippcaas.cn

Abstract:

Pathogenicity variation in Fusarium graminearum from different locations to wheat under different temperature conditions was compared. In 2018 and 2019,diseased wheat heads were collected from the winter wheat ecological region of Huang and Huai River Valleys and spring wheat ecological region of the Northeast China,a total of 110 Fusarium strains were obtained after single-spore isolation. The EF-1α sequences of the isolated strains were used to identify the Fusarium species. The results demonstrated that F. graminearum was the predominant species causing wheat head blight in the two ecological regions. Ten F. graminearum strains from each ecological region were randomly selected and inoculation was conducted by single floret injection method in two locations of Langfang representing the high temperate region and Xining representing lower temperature region. Significant difference of pathogenicity was observed in Xining. The F. graminearum populations from the Northeast China spring wheat region showed significantly higher pathogenicity than the population from Huang and Huai River Valleys wheat region. However,the pathogenicity of the two populations was similar in Langfang site. This indicates that the F. graminearum population in the Northeast China spring wheat region has a higher adaptability at low temperature. Results of the study indicate that temperature influences the pathogenicity of F. graminearum populations,which is significant for studying the pathogenicity differentiation of F. graminearum and comprehensive control and prevention of wheat head blight.

Key words: wheat head blight, temperature, pathogenicity