Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (8): 1814-1822.DOI: 10.3969/j.issn.1004-1524.20221234

• Animal Science • Previous Articles     Next Articles

Genomic features of 3 bovine viral diarrhea viruses isolated from newborn claves

WANG Mengzhu1,2,3(), YANG Guangmei3, WU Yuhu1,2,3, YANG Xuanye1,2,3, WANG Huihui1,2,3, CAO Xiaoan4, LI Yong4, MA Zhongren1,2, MA Xiaoxia1,2,*()   

  1. 1. Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China
    2. Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China
    3. College of Life Science and Engineering, Northwest Minzu University, Lanzhou 730010, China
    4. Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
  • Received:2022-08-22 Online:2023-08-25 Published:2023-08-29

Abstract:

To study the genetic evolution of Bovine viral diarrhea virus(BVDV)-infected newborn calves in different regions of China, the newborn Holstein calf serum from Shandong, Inner Mongolia and Ningxia provinces preserved in the laboratory was used as the material, and the calf serum was detected by RT-PCR for BVDV RNA, and the positive serum was inoculated into Madin-Darby bovine kidney cells (MDBK). Three isolates were identified as BVDV and named as 21NM-44, 21NX-53 and 21SD-16, respectively. According to the cytopathic ability of the 3 isolates to MDBK cells, 21NM-44 was determined to be a non-cytopathic strain, while 21NX-53 and 21SD-16 could cause cytopathic and were determined to be cytopathic strains. Using specific PCR primers, the whole genome sequences of the 3 viruses were cloned and identified. Based on the whole genome sequences, a phylogenetic tree was established and their genetic evolution relationship was analyzed. The results showed that the 3 wild BVDV isolates from different regions had a high degree of genetic evolution relationship with the BVDV GXNN1 strain (BVDV-1c). This study made a foundation for further research on the evolution of BVDV in China.

Key words: Bovine viral diarrhea virus, newborn calf, whole genome, Madin-Darby bovine kidney cell, cytopathic ability

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