1 National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China.
2 Area of Agroforestry Engineering, School of Agricultural Engineering, University of Seville, Seville, Spain.
3 Margot Forde Germplasm Centre, Grasslands Research Centre, AgResearch, Palmerston North, New Zealand.