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Rapid spread of a symbiotic virus in a major crop pest following wide-scale adoption of Bt-cotton in China

Yutao Xiao, Wenjing Li, Xianming Yang, Pengjun Xu, Minghui Jin, He Yuan, Weigang Zheng, Mario Soberón, Alejandra Bravo, View ORCID ProfileKenneth Wilson, View ORCID ProfileKongming Wu
doi: https://doi.org/10.1101/2021.02.08.430243
Yutao Xiao
1The State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing, 100193, China
2Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518120, China
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Wenjing Li
1The State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing, 100193, China
3Institute of Plant Protection and Soil Fertility, Hubei Academy of Agricultural Sciences, Wuhan, 430064, China
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Xianming Yang
1The State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing, 100193, China
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Pengjun Xu
4Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
5Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, United Kingdom
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Minghui Jin
2Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518120, China
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He Yuan
2Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518120, China
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Weigang Zheng
2Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518120, China
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Mario Soberón
6Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 510-3, Cuernavaca 62250, Morelos, Mexico
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Alejandra Bravo
6Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 510-3, Cuernavaca 62250, Morelos, Mexico
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Kenneth Wilson
5Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, United Kingdom
2Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518120, China
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  • ORCID record for Kenneth Wilson
Kongming Wu
1The State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing, 100193, China
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  • ORCID record for Kongming Wu
  • For correspondence: wukongming@caas.cn
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Abstract

Bacillus thuringiensis (Bt) crops have been widely planted and the effects of Bt-crops on populations of the target and non-target insect pests were well studied. However, the effects of Bt-crops exposure on microorganisms that interact with crop pests haven’t previously been quantified. Here, we use laboratory and field data to show that infection of Helicoverpa armigera with a symbiotic densovirus (HaDV2) is associated with its enhanced growth and resistance to Bt-cotton. Moreover, field monitoring showed a much higher incidence of cotton bollworm infection with HaDV2 in regions cultivated with Bt-cotton than in regions without it, with the rate of densovirus infection increasing with increasing use of Bt-cotton. RNA-seq suggested resistance to both baculovirus and Cry1Ac were enhanced via the immune-related pathways. These suggest that the exposure to Bt-crops has selected for beneficial interactions between the target pest and a symbiotic microorganism that enhances its performance on Bt-crops under field conditions.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted February 10, 2021.
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Rapid spread of a symbiotic virus in a major crop pest following wide-scale adoption of Bt-cotton in China
Yutao Xiao, Wenjing Li, Xianming Yang, Pengjun Xu, Minghui Jin, He Yuan, Weigang Zheng, Mario Soberón, Alejandra Bravo, Kenneth Wilson, Kongming Wu
bioRxiv 2021.02.08.430243; doi: https://doi.org/10.1101/2021.02.08.430243
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Rapid spread of a symbiotic virus in a major crop pest following wide-scale adoption of Bt-cotton in China
Yutao Xiao, Wenjing Li, Xianming Yang, Pengjun Xu, Minghui Jin, He Yuan, Weigang Zheng, Mario Soberón, Alejandra Bravo, Kenneth Wilson, Kongming Wu
bioRxiv 2021.02.08.430243; doi: https://doi.org/10.1101/2021.02.08.430243

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