1. Department of Agronomy Zhejiang University Hangzhou Zhejiang 310 053 China
2. Department of Ecology, Evolution, and Organismal Biology (EEOB), Bessey Hall Iowa State University Ames IA 50011 USA
3. State Key Laboratory of Cotton Biology Institute of Cotton Research, Chinese Academy of Agricultural Sciences Anyang 455 000 China
4. Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences Shenzhen 518 120 China