1. Institute for Genomics Diversity, Cornell University , Ithaca, NY 14853 , USA
2. International Maize and Wheat Improvement Center (CIMMYT) , Km 45 Carretera México-Veracruz, El Batan, Edo. de México 5623 , Mexico
3. NIAB , 93 Lawrence Weaver Road, Cambridge CB3 0LE , UK
4. Louisiana State University , Baton Rouge 70803 , USA
5. Facultad de Telemática, Universidad de Colima , Colima 28040 , Mexico
6. Colegio de Postgraduados, Montecillo , Edo. de México 56231 , Mexico