基金supported by China National Natural Science Foundation(30360053)Science and Technology Department of Guangxi(Project No.Gui Ice Neng 05112001-1A1)Guangxi Key Labo ratory of Subtropical Bioresource Conservation and Utilization.
基金The financial support for the present study from National Natural Science Foundation of China(30260058)Scientific and Technological Development Foundation of Guangxi Academy of Agricultural Sciences is thankfully acknowledged..