1. Institute of Plant Sciences, Swiss Federal Institute of Technology, Universitätstrasse 2, CH–8092 Zurich, Switzerland (M.B., A.S., F.B., F.K., N.A.); and
2. Novartis Agribusiness Biotechnology Research, Inc., P.O. Box 12257, Research Triangle Park, North Carolina 27709–2257 (J.S.)