1. Montpellier SupAgro; UMR SYSTEM; 34060 Montpellier France
2. International Center for Tropical Agriculture (CIAT); Cali Colombia
3. Crop Physiology Laboratory; International Center for Agricultural Research in the Dryland Areas (ICARDA); Rabat Morocco
4. Crop and Soil Sciences Department, North Carolina State University (NCSU); Raleigh NC USA
5. Institut Agronomique Vétérinaire (IAV); Rabat Morocco