Affiliation: | (1) National Key Facility of Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, 12 Zhong-guan-cun South St., 100081 Beijing, P.R. China;(2) Applied Biotechnology Center CIMMYT Apdo, Apdo. Postal 6-641, Mexico, D.F., 06600, Mexico;(3) Life School, Beijing Capital Normal University, Beijing, P.R. China |