QU Shen-Chun1, DU Bei-bei1, XIA Jing1, ZHANG Ji-yu2, LU Dong1, Gao Zhi-hong1 and Zhang Zhen1*
1College of Horticulture, Nanjing Agricultural University, Nanjing, 210095 P. R. China.
2Institute of Botany, Jiangsu Province and the Chinese Academy of Sciences, Nanjing, Jiangsu 210014 P. R. China.
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