Benjamin B. Stewart-Brown, Justin N. Vaughn, Thomas E. Carter Jr., Zenglu Li*B. B. Stewart-Brown, Center for Applied Genetic Technologies & Dep. of Crop and Soil Sci., University of Georgia, Athens, GA 30602; J.N. Vaughn, Center for Applied Genetic Technologies & Dep. of Crop and Soil Sci., University of Georgia, Athens, GA 30602; T. E. Carter, Jr., USDA-ARS, Raleigh, NC 27695; Z. Li,  Center for Applied Genetic Technologies & Dep. of Crop and Soil Sci., University of Georgia, Athens, GA 30602. *Corresponding author (zli@uga.edu).