1. Divisions of Plant Science and Biochemistry National Center for Soybean Biotechnology Christopher S. Bond Life Sciences Center University of Missouri Columbia MO 65211 USA
2. Department of Plant and Soil Sciences and Delaware Biotechnology Institute University of Delaware Newark DE 19711 USA
3. National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI) Institute of Crop Science Chinese Academy of Agricultural Sciences Beijing 100081 China
4. Department of Statistics University of Missouri 209D Middlebush Hall Columbia MO 65211 USA