1. Institute of Crop Science Chinese Academy of Agricultural Sciences Beijing 10008 China
2. Institute for Genomic Diversity Cornell University Ithaca NY 14853 USA
3. United States Department of Agriculture‐Agricultural Research Service Ithaca NY 14853 USA
4. Department of Animal Science Northeast Agricultural University Harbin Heilongjiang 150030 China
5. Department of Crop and Soil Sciences Washington State University Pullman WA 99164 USA