1. International Maize and Wheat Improvement Center (CIMMYT)Apdo. Postal 6‐64106600Mexico CityMexico
2. Colegio de PostgraduadosCP 56230, MontecillosEdo. de MéxicoMéxico
3. Syngenta Seeds12, Chemin de l'Hobit31790Saint‐SauveurFrance
4. Syngenta Seeds11055 Wayzata BoulevardMinnetonkaMN55305