1. Department of Forest Molecular Genetics and Biotechnology, Forestry and Forest Products Research Institute, Tsukuba, Ibaraki 305-8687, Japan
2. Department of Evolutionary Biology and Environmental Studies, University of Zurich, CH-8057 Zurich, Switzerland
3. Department of Plant and Microbial Biology, University of Zurich, CH-8008 Zurich, Switzerland
4. Functional Genomics Center Zurich, CH-8057 Zurich, Switzerland
5. Swiss Institute of Bioinformatics, CH-1015 Lausanne, Switzerland
6. Institute of Agricultural Sciences, ETH Zurich, CH-8092 Zurich, Switzerland, and
7. Kihara Institute for Biological Research (KIBR), Yokohama City University, 641-12 Maioka, Totsuka-ward, Yokohama 244-0813, Japan