ACKNOWLEDGMENT
This work was supported by the National Key R&D Program (No. 2017YFD0501702), Open Project of Key Laboratory of SFGA on Conservation Biology of Rare Animals in The Giant Panda National Park (CCRCGP, No.2020004), Forestry science and technology research project (No. 20180302), the Pearl River Talent Recruitment Program in Guangdong Province (2019CX01N111), Fundamental Research Funds for the Central Universities (No. 2572020AA30) of China, the Foundation of Key Laboratory of State Forestry and Grassland Administration (State Park Administration) on Conservation Biology of Rare Animals in the Giant Panda National Park (No. KLSFGAGP2020.002), and the Guangdong Provincial Key Laboratory of Genome Read and Write (grant No. 2017B030301011).