1 Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Beijing Key Laboratory of Vegetable Germplasm Improvement, National Watermelon and Melon Improvement Center, Beijing Academy of Agricultural and Forestry Sciences, Beijing,, 100097, North China, China.
2 Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Beijing Key Laboratory of Vegetable Germplasm Improvement, National Watermelon and Melon Improvement Center, Beijing Academy of Agricultural and Forestry Sciences, Beijing,, 100097, North China, China. renyi@nercv.org.
3 Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Beijing Key Laboratory of Vegetable Germplasm Improvement, National Watermelon and Melon Improvement Center, Beijing Academy of Agricultural and Forestry Sciences, Beijing,, 100097, North China, China. xuyong@nercv.org.