1. Institute of Crop Science, National Wheat Improvement Center/The National Key Facility for Crop Gene Resources and Genetic Improvement; Chinese Academy of Agricultural Sciences (CAAS); 12 Zhongguancun South St. Beijing 100081 China
2. College of Agronomy; Northwest Sci-Tech Univ. of Agriculture and Forestry; Yangling Shaanxi 712100 China
3. Dep. of Plant Sciences; Univ. of California; Davis CA 95615 USA
4. CIMMYT China Office, C/O CAAS; 12 Zhongguancun South St. Beijing 100081 China