1 College of Life Science and Technology, College of Agronomy, Gansu Provincial Key Lab of Aridland Crop Science, Gansu Key Lab of Crop Genetic Improvement & Germplasm Enhancement, Gansu Provincial Key Lab of Good Agricultural Production for Traditional Chinese Medicines, Gansu Provincial Engineering Research Centre for Medical Plant Cultivation and Breeding, Gansu Agricultural University, Lanzhou, 730070, China.
2 CSIR-Oil Palm Research Institute, P.O BOX 74, Kusi, Ghana.
3 College of Life Science and Technology, College of Agronomy, Gansu Provincial Key Lab of Aridland Crop Science, Gansu Key Lab of Crop Genetic Improvement & Germplasm Enhancement, Gansu Provincial Key Lab of Good Agricultural Production for Traditional Chinese Medicines, Gansu Provincial Engineering Research Centre for Medical Plant Cultivation and Breeding, Gansu Agricultural University, Lanzhou, 730070, China. cygcx1963@163.com.
4 College of Life Science and Technology, College of Agronomy, Gansu Provincial Key Lab of Aridland Crop Science, Gansu Key Lab of Crop Genetic Improvement & Germplasm Enhancement, Gansu Provincial Key Lab of Good Agricultural Production for Traditional Chinese Medicines, Gansu Provincial Engineering Research Centre for Medical Plant Cultivation and Breeding, Gansu Agricultural University, Lanzhou, 730070, China. guofx@gsau.edu.cn.