1. USDA Agricultural Research Service, Tree Fruit Research Laboratory , 1104 N. Western Ave., Wenatchee, WA, 98801 , USA
2. Tree Fruit Research and Extension Center, Department of Horticulture, Washington State University , 1100 N. Western Ave., Wenatchee, WA, 98801 , USA
3. Department of Biology, The Huck Institutes of the Life Sciences, Pennsylvania State University , 101 Huck Life Sciences Building, University Park, PA, 16802 , USA
4. Department of Horticulture, Washington State University , 251 Clark Hall, Pullman, WA, 99164 , USA
5. Department of Plant Pathology, University of Georgia , 2360 Rainwater Rd, Tifton, GA, 31798 , USA
6. Department of Statistics, The Huck Institutes of the Life Sciences, Pennsylvania State University , 312 Thomas Building, University Park, PA, 16802 , USA