1. a National Institute for Agro‐Environmental Sciences , Tsukuba, 305‐8604, Japan
2. b Michigan State University , East Lansing, MI 48823
3. c INRA‐CSE , Domaine Saint‐Paul , 84914 Avignon Cedex 9, France
4. d Forestry and Forest Products Research Institute , Tsukuba, Ibaraki 305‐8687, Japan
5. e Kyoto University , Kyoto 606‐6502, Japan
6. f National Agriculture and Forest Research Institute , PO Box 10896, Vientiane, Lao PDR