[1] Int Maize & Wheat Improvement Ctr CIMMYT, Apdo Postal 6-641, Mexico City 06600, DF, Mexico
[2] Colegio Postgrad, Texcoco 56230, Edo De Mexico, Mexico
[3] Univ Quintana Roo, Quintana Roo 77019, Mexico
[4] Univ Colima, Fac Telemat, Colima 28040, Mexico
[5] Univ Nebraska, Dept Agron & Hort, 321 Keim Hall, Lincoln, NE 68503 USA
[6] Michigan State Univ, Dept Epidemiol & Biostat, 909 Fee Rd,Room B601, E Lansing, MI 48824 USA
[7] Int Crops Res Inst Semi Arid Trop, Patancheru 502324, Telangana, India
[8] Int Rice Res Inst, Los Banos 4030, Philippines