Supported by the National Natural Science Foundation of China (30500049, 30470119 and 30300033). Tian Tang is supported by International Foundation for Science (IFS). Publication of this paper is supported by the National Natural Science Foundation of China (30624808).Acknowledgements We thank Chung-1 Wu at the University of Chicago for many thoughtful comments.
Domestication is a selection process that genetically modifies species to meet human needs. A most intriguing feature of domestication is the extreme phenotypic diversification among breeds. What could be the ultimate...