1. Biodiversity Research Center, Academia Sinica, Taipei 115, Taiwan
2. Department of Plant Biology, Michigan State University, East Lansing, MI 48824
3. Department of Computational Mathematics, Science, and Engineering, Michigan State University, East Lansing, MI 48824
4. Department of Bioagricultural Science, National Chiayi University, Chiayi 600, Taiwan
5. School of Biological Sciences, Washington State University, Pullman, WA 99164
6. Institute of Plant and Microbial Biology, Academia Sinica, Taipei 115, Taiwan
7. Department of Ecology and Evolution, University of Chicago, Chicago, IL 60637