Funding for this research was provided by:
National Natural Science Foundation of China (31771374, 31671286, 31672397)
Shandong Provincial Natural Science Foundation for Distinguished Young Scholars of China (JQ201709)
Major Project of National Transgene in China (2018ZX08007001-002)
National Cow Industrial Technology System of China (CARS-36)
Shandong Provincial Key Research and Development Program of China (2017GNC10120)
Text and Data Mining valid from 2019-05-16
Received: 11 September 2018
Accepted: 2 May 2019
First Online: 16 May 2019
Ethics approval and consent to participate
: All experiments were carried out according to the Regulations for the Administration of Affairs Concerning Experimental Animals published by the Chinese Ministry of Science and Technology in 2004 and approved by the Animal Care and Use Committee at the Dairy Cattle Research Center, Shandong Academy of Agricultural Sciences, Shandong, P. R. China.
: Not applicable.
: The authors have declared that they have no competing interests.
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