[1] Int Crops Res Inst Semi Arid Trop, Patancheru 502324, Andhra Pradesh, India
[2] CIMMYT, Generat Challenge Programme, Mexico City 06600, DF, Mexico
[3] Univ Western Australia, Sch Plant Biol M084, Fac Nat & Agr Sci, Crawley, WA 6009, Australia
[4] UMR DAP, CIRAD, F-34398 Montpellier 5, France
[5] Int Rice Res Inst, Manila 1301, Philippines