A global-temporal analysis on Phytophthora sojae resistance-gene efficacy

Austin G. McCoy (), Richard R. Belanger, Carl A. Bradley, Daniel G. Cerritos-Garcia, Vinicius C. Garnica, Loren J. Giesler, Pablo E. Grijalba, Eduardo Guillin, Maria A. Henriquez, Yong Min Kim, Dean K. Malvick, Rashelle L. Matthiesen, Santiago X. Mideros, Zachary A. Noel, Alison E. Robertson, Mitchell G. Roth, Clarice L. Schmidt, Damon L. Smith, Adam H. Sparks, Darcy E. P. Telenko, Vanessa Tremblay, Owen Wally and Martin I. Chilvers ()
Additional contact information
Austin G. McCoy: Michigan State University
Richard R. Belanger: Université Laval
Carl A. Bradley: University of Kentucky
Daniel G. Cerritos-Garcia: University of Connecticut
Vinicius C. Garnica: North Carolina State University
Loren J. Giesler: University of Nebraska-Lincoln
Pablo E. Grijalba: Universidad de Buenos Aires
Eduardo Guillin: Instituto Nacional de Tecnologia Agropecuaria
Maria A. Henriquez: Agriculture and Agri-Food Canada
Yong Min Kim: Agriculture and Agri-Food Canada
Dean K. Malvick: University of Minnesota
Rashelle L. Matthiesen: Iowa State University
Santiago X. Mideros: University of Illinois at Urbana-Champaign
Zachary A. Noel: Auburn University
Alison E. Robertson: Iowa State University
Mitchell G. Roth: The Ohio State University-Wooster
Clarice L. Schmidt: Iowa State University
Damon L. Smith: University of Wisconsin-Madison
Adam H. Sparks: Department of Primary Industries and Regional Development
Darcy E. P. Telenko: Purdue University
Vanessa Tremblay: Université Laval
Owen Wally: Agriculture and Agri-Food Canada
Martin I. Chilvers: Michigan State University

Nature Communications, 2023, vol. 14, issue 1, 1-13

Abstract: Abstract Plant disease resistance genes are widely used in agriculture to reduce disease outbreaks and epidemics and ensure global food security. In soybean, Rps (Resistance to Phytophthora sojae) genes are used to manage Phytophthora sojae, a major oomycete pathogen that causes Phytophthora stem and root rot (PRR) worldwide. This study aims to identify temporal changes in P. sojae pathotype complexity, diversity, and Rps gene efficacy. Pathotype data was collected from 5121 isolates of P. sojae, derived from 29 surveys conducted between 1990 and 2019 across the United States, Argentina, Canada, and China. This systematic review shows a loss of efficacy of specific Rps genes utilized for disease management and a significant increase in the pathotype diversity of isolates over time. This study finds that the most widely deployed Rps genes used to manage PRR globally, Rps1a, Rps1c and Rps1k, are no longer effective for PRR management in the United States, Argentina, and Canada. This systematic review emphasizes the need to widely introduce new sources of resistance to P. sojae, such as Rps3a, Rps6, or Rps11, into commercial cultivars to effectively manage PRR going forward.

Date: 2023
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DOI: 10.1038/s41467-023-41321-7

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