1. Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Zhejiang 310029, China
2. National Key Laboratory of Crop Genetics and Germplasm Enhancement, Cotton Research Institute, Nanjing Agricultural University, Nanjing 210095, P.R. China
3. School of Environmental and Life Sciences and Australia-China Research Centre for Crop Improvement, The University of Newcastle, NSW 2308, Australia