1. Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun Jilin 130102
2. Univ. of Chinese Academy of Sciences Beijing 100049 Beijing China
3. Da'an Sodic Land Experiment Station Da'an Jilin 131317
4. Key Lab. of Soybean Molecular Design Breeding Chinese Academy of Sciences Harbin Heilongjiang 150081 China
5. Disease Resistant Crop Research Unit National Institute of Agrobiological Sciences Kannondai 2‐1‐2 Tsukuba 305‐8602 Japan