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. 2023 May 31;14:1186322. doi: 10.3389/fmicb.2023.1186322

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Copyright © 2023 Li, Li, Guo, Xu, Gong, Sun, Zhao, Xiang, Leng, Peng, Zhou, Tang, Liu, An, Cai, Tian, Wang and Zhang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The deduced 5’-UTR and 3’-UTR nucleotide sequences of the new-branch strains compared with the reference PRRSV strains. (A) The positions of the deduced 5’-UTR nucleotide sequences relative to the VR-2332 strain. (B) The positions of the deduced 3’-UTR nucleotide sequences relative to the VR-2332 strain. Purple indicates the common nt deletions of intermediate PRRSV, new-branch PRRSV and HP-PRRSV, while green indicates new deletions on this basis; a red box indicates a highly conserved motif at positions 117–120 in the 3’-UTR, yellow represents the motif of the new-branch PRRSV, and cyan represents the motif of the Classical strain, intermediate strain and HP-PRRRSV. The new-branch PRRSV strains obtained in this study are labeled with red triangles (▲). The strains obtained from GenBank belonging to the new branch are marked with blue squares (■).