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Rojas JA, Jacobs JL, Napieralski S, Karaj B, Bradley CA, Chase T, Esker PD, Giesler LJ, Jardine DJ, Malvick DK, Markell SG, Nelson BD, Robertson AE, Rupe JC, Smith DL, Sweets LE, Tenuta AU, Wise KA, Chilvers MI. Oomycete Species Associated with Soybean Seedlings in North America-Part II: Diversity and Ecology in Relation to Environmental and Edaphic Factors. PHYTOPATHOLOGY 2017; 107:293-304. [PMID: 27841963 DOI: 10.1094/phyto-04-16-0176-r] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Soybean (Glycine max (L.) Merr.) is produced across a vast swath of North America, with the greatest concentration in the Midwest. Root rot diseases and damping-off are a major concern for production, and the primary causal agents include oomycetes and fungi. In this study, we focused on examination of oomycete species distribution in this soybean production system and how environmental and soil (edaphic) factors correlate with oomycete community composition at early plant growth stages. Using a culture-based approach, 3,418 oomycete isolates were collected from 11 major soybean-producing states and most were identified to genus and species using the internal transcribed spacer region of the ribosomal DNA. Pythium was the predominant genus isolated and investigated in this study. An ecology approach was taken to understand the diversity and distribution of oomycete species across geographical locations of soybean production. Metadata associated with field sample locations were collected using geographical information systems. Operational taxonomic units (OTU) were used in this study to investigate diversity by location, with OTU being defined as isolate sequences with 97% identity to one another. The mean number of OTU ranged from 2.5 to 14 per field at the state level. Most OTU in this study, classified as Pythium clades, were present in each field in every state; however, major differences were observed in the relative abundance of each clade, which resulted in clustering of states in close proximity. Because there was similar community composition (presence or absence) but differences in OTU abundance by state, the ordination analysis did not show strong patterns of aggregation. Incorporation of 37 environmental and edaphic factors using vector-fitting and Mantel tests identified 15 factors that correlate with the community composition in this survey. Further investigation using redundancy analysis identified latitude, longitude, precipitation, and temperature as factors that contribute to the variability observed in community composition. Soil parameters such as clay content and electrical conductivity also affected distribution of oomycete species. The present study suggests that oomycete species composition across geographical locations of soybean production is affected by a combination of environmental and edaphic conditions. This knowledge provides the basis to understand the ecology and distribution of oomycete species, especially those able to cause diseases in soybean, providing cues to develop management strategies.
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Affiliation(s)
- J Alejandro Rojas
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Janette L Jacobs
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Stephanie Napieralski
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Behirda Karaj
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Carl A Bradley
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Thomas Chase
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Paul D Esker
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Loren J Giesler
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Doug J Jardine
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Dean K Malvick
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Samuel G Markell
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Berlin D Nelson
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Alison E Robertson
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - John C Rupe
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Damon L Smith
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Laura E Sweets
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Albert U Tenuta
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Kiersten A Wise
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
| | - Martin I Chilvers
- First, second, third, fourth, and nineteenth authors: Department of Plant, Soil and Microbial Sciences, and first and nineteenth authors: Program in Ecology, Evolutionary Biology and Behavior, Michigan State University, East Lansing 48824; fifth author; Department of Crop Sciences, University of Illinois, Urbana 61801; sixth author: Department of Plant Science, South Dakota State University, Brookings 57007; seventh and fifteenth authors: Department of Plant Pathology, University of Wisconsin-Madison 53706; eighth author: Department of Plant Pathology, University of Nebraska-Lincoln 68583; ninth author: Department of Plant Pathology, Kansas State University, Manhattan 66506; tenth author: Department of Plant Pathology, University of Minnesota, St. Paul 55108; eleventh and twelfth authors: Department of Plant Pathology, North Dakota State University, Fargo 58105; thirteenth author: Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011; fourteenth author: Department of Plant Pathology, University of Arkansas, Fayetteville 72701; sixteenth author: Division of Plant Sciences, University of Missouri, Columbia 65211; seventeenth author: Ontario Ministry of Agriculture, Food & Rural Affairs, Ridgetown, ON N0P2C0, Canada; and eighteenth author: Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907
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