广东省科技计划项目No.2012B010500036;广东省农业科技成果转化项目No.2012NL040;广东省中国科学院全面战略合作项目No.2012B091100271;国家自然科学基金No.31100353Supported by the Program of Guangdong Province Science and Technology No.2012B010500036,the Transformation Program of Guangdong Province Agricultural Science and Technology Achievements No.2012NL040,the Comprehensive Strategic Cooperation Program between Guangdong Province and Chinese Academy of Sciences No.2012B091100271 and the National Natural Science Foundation of ChinaNo.31100353