1. Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT 06269, USA.
2. Qinghai Provincial Key Laboratory of Crop Molecular Breeding and Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, Qinghai, China.
3. State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, Guangdong 510642, China.
4. Department of Biology, University of Washington, Seattle, WA 98195, USA.
5. Department of Biology, Haverford College, Haverford, PA 19041, USA.
6. Institute for Systems Genomics, University of Connecticut, Storrs, CT 06269, USA.