[1] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA
[2] NI Vavilov Inst Plant Breeding, St Petersburg 190000, Russia
[3] Tallinn Univ Technol, Dept Gene Technol, EE-19086 Tallinn, Estonia
[4] Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA
[5] Pioneer HiBred Int Inc, Johnston, IA 50131 USA