1. Université de Strasbourg, UMR 7363 SAGE, Strasbourg, France
2. INNOVATION, Univ Montpellier, CIRAD, INRAE, Institut Agro, Montpellier, France
3. CIRAD, UMR INNOVATION, Texcoco, Mexico
4. International Maize and Wheat Improvement Center (CIMMYT), Texcoco, Mexico