1. a IRRI , MCPO Box 1271, Makati , 3127 , Philippines Fax: E-mail:
2. b IRRI , MCPO Box 1271, Makati , 3127 , Philippines
3. c University of Hawaii , 2500 Dole St. Kraus 22, Honolulu , Hawaii , 96822
4. d ViSCA , Bay Bay, Leyte , Philippines
5. e SAIAT , Sukarami, Padang , Indonesia
6. f North Carolina State University , Raleigh , North Carolina , 27695
7. g University of Hawaii , 1910 East West Road, Honolulu , Hawaii , 96822