Open AccessA new Bacillus thuringiensis protein for Western corn rootworm control
Author(s) -
Yong Yin,
Stanisław Flasiński,
William J. Moar,
David Bowen,
Cathy Chay,
Jason Milligan,
Jean-Louis K. Kouadio,
Aihong Pan,
Brent J. Werner,
Karrie A. Buckman,
Jun Zhang,
Geoffrey M. Mueller,
Collin Preftakes,
Bruce E. Hibbard,
Paula A. Price,
James K. Roberts
Publication year - 2020
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0242791
Subject(s) - western corn rootworm , bacillus thuringiensis , biology , genetically modified maize , genetically modified crops , agronomy , pest analysis , genetically modified organism , european corn borer , pest control , strain (injury) , biological pest control , transgene , botany , gene , genetics , bacteria , anatomy
The Western corn rootworm (WCR) Diabrotica virgifera virgifera LeConte is one of the most economically important insect pests in North America. Since 2003, transgenic maize expressing WCR-active proteins from Bacillus thuringiensis ( Bt ) have been widely adopted as the main approach to controlling WCR in the U.S. However, the emergence of field resistance to the Bt proteins in current commercial products has been documented in recent years, highlighting the need to develop additional tools for controlling this devasting pest. Here we report the discovery of Vpb4Da2 (initially assigned as Vip4Da2), a new insecticidal protein highly selective against WCR, through high-throughput genome sequencing of a Bt strain sourced from grain dust samples collected in the eastern and central regions of the US. Vpb4Da2 contains a sequence and domain signature distinct from families of other WCR-active proteins. Under field conditions, transgenic maize expressing Vpb4Da2 demonstrates commercial-level (at or below NIS 0.25) root protection against WCR, and reduces WCR beetle emergence by ≥ 97%. Our studies also conclude that Vpb4Da2 controls WCR populations that are resistant to WCR-active transgenic maize expressing Cry3Bb1, Cry34Ab1/Cry35Ab1 (reassigned as Gpp34Ab1/Tpp35Ab1), or DvSnf7 RNA. Based on these findings, Vpb4Da2 represents a valuable new tool for protecting maize against WCR.