1. Department of Horticultural Science, North Carolina State University, Raleigh, NC 27607, USA.
2. Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
3. The Center for Bioenergy Innovation, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
4. Warnell School of Forestry and Natural Resource, University of Georgia, Athens, GA 30602, USA.
5. Department of Plant Biology, University of Georgia, Athens, GA 30602, USA.
6. Department of Genetics, University of Georgia, Athens, GA 30602, USA.
7. Mountain Crop Improvement Lab, Department of Horticultural Science, Mountain Horticultural Crops Research and Extension Center, North Carolina State University, Mills River, NC 28759, USA.