1. Genome Science and Technology Program, University of Tennessee, Knoxville, Tennessee, 37996
2. Department of Plant Sciences, University of Tennessee, Knoxville, Tennessee, 37996
3. Department of Biochemistry, Cellular, and Molecular Biology, University of Tennessee, Knoxville, Tennessee, 37996
4. Université de Toulouse, INP-ENSAT, INRA, UMR 990 Génomique et Biotechnologie des Fruits, F-31326 Castanet-Tolosan Cedex, France