1. Center for Plant Molecular Biology Tamil Nadu Agrl. University Coimbatore 641 003 India
2. Department of Plant and Soil Science Texas Tech University Lubbock TX 79409 USA
3. Department of Agronomy University of Missouri Columbia MO 65211 USA
4. Agricultural Research Station Paramakudi India
5. International Rice Research Institute Chatuchak Bangkok 10900 Thailand
6. University of Western Australia 35, Stirling Highway Crawley WA 6009