1. Department of Agronomy, Maria de Maeztu Excellence Unit, University of Córdoba, 14071 Córdoba, Spain
2. Department of Biology, College of Science and Mathematics, California State University, Fresno, CA 93740, U.S.A.
3. Department of Plant Pathology, University of California-Davis Kearney Agricultural Research and Extension Center, Parlier, CA 93648, U.S.A.
4. International Institute of Tropical Agriculture, Ibadan 200001, Nigeria
5. Department of Plant Sciences, University of California-Davis, Davis, CA 95616, U.S.A.