Transposon insertion causes cadherin mis-splicing and confers resistance to Bt cotton in pink bollworm from China
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Author
Wang, LingWang, Jintao
Ma, Yuemin
Wan, Peng
Liu, Kaiyu
Cong, Shengbo
Xiao, Yutao
Xu, Dong
Wu, Kongming
Fabrick, Jeffrey A
Li, Xianchun
Tabashnik, Bruce E
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Univ Arizona, Dept EntomolIssue Date
2019-05-16
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Wang, L., Wang, J., Ma, Y., Wan, P., Liu, K., Cong, S., ... & Li, X. (2019). Transposon insertion causes cadherin mis-splicing and confers resistance to Bt cotton in pink bollworm from China. Scientific reports, 9(1), 7479.Journal
SCIENTIFIC REPORTSRights
© The Author(s) 2019. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Transgenic crops producing insecticidal proteins from Bacillus thuringiensis (Bt) are cultivated extensively, but rapid evolution of resistance by pests reduces their efficacy. We report a 3,370-bp insertion in a cadherin gene associated with resistance to Bt toxin Cry1Ac in the pink bollworm (Pectinophora gossypiella), a devastating global cotton pest. We found the allele (r15) harboring this insertion in a field population from China. The insertion is a miniature inverted repeat transposable element (MITE) that contains two additional transposons and produces two mis-spliced transcript variants (r15A and r15B). A strain homozygous for r15 had 290-fold resistance to Cry1Ac, little or no cross-resistance to Cry2Ab, and completed its life cycle on Bt cotton producing Cry1Ac. Inheritance of resistance was recessive and tightly linked with r15. For transformed insect cells, susceptibility to Cry1Ac was greater for cells producing the wild-type cadherin than for cells producing the r15 mutant proteins. Recombinant cadherin protein occurred on the cell surface in cells transformed with the wildtype or r15A sequences, but not in cells transformed with the r15B sequence. The similar resistance of pink bollworm to Cry1Ac in laboratory-and field-selected insects from China, India and the U.S. provides a basis for developing international resistance management practices.Note
Open access journalISSN
2045-2322PubMed ID
31097777Version
Final published versionSponsors
China's Key Project for Breeding Genetically Modified Organisms [2016ZX08012-004]; Agriculture and Food Research Initiative Competitive Grant from the USDA National Institute of Food and Agriculture [2018-67013-27821]ae974a485f413a2113503eed53cd6c53
10.1038/s41598-019-43889-x
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Except where otherwise noted, this item's license is described as © The Author(s) 2019. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License.
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