Fig. 1

The maps of Shiqu County. a The map of China; Sichuan Province is marked in yellow. b The map of Ganze Tibetan Autonomous Prefecture; Shiqu County is marked in yellow. c The map of Shiqu; the sample collection locations are represented with black triangles (1. Ariza; 2. Maga; 3. Derongma; 4. Changxgma). The map was created with Adobe Photoshop CS4 (Version 11.01, https://www.adobe.com/products/photoshop.html)