1. International Rice Research Institute (IRRI), India Office New Delhi 110012 India
2. Dep. of Crop and Soil Sciences Cornell Univ. Ithaca 14853 NY
3. Rice–Wheat Consortium for IGP CIMMYT‐RWC CG Block, NASC Complex, DPS Marg, Pusa Campus New Delhi 110012 India
4. IRRI Los Baños Manila The Philippines