Bayer Crop Science, Chesterfield, MO, United States of America.|Department of Plant and Microbial Biology, University of California-Berkeley, Berkeley, CA, United States of America.|Division of Biological Sciences, University of Montana, Missoula, MT, United States of America.|Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, United States of America.|Department of Genetics, University of Georgia, Athens, GA, United States of America.|Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, United States of America.