Funding for this research was provided by:
Research Fund for the Chengdu Research of Giant Panda Breeding (CPF2014-17)
Livestock Breeding Project of Sichuan Province (2016NYZ0046)
Special Financial Operation of Sichuan Province (SASA2014CZYX005)
Received: 21 May 2019
Accepted: 23 October 2019
First Online: 8 November 2019
Ethics approval and consent to participate
: All animals were handled in strict accordance with the animal protection laws of the People’s Republic of China (following the draft of an animal protection law in China released on September 18, 2009). All procedures were implemented in strict accordance with the Guide for the Care and Use of Laboratory Animals of the Animal Ethics Committee of Sichuan Agricultural University (Ya’an, China; Approval No. 2015–028). All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.