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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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Genome recombination analysis of the SDWH86 isolate. (A) Similarity plots generated with the representative strains HuN4, VR-2332 and QYYZ by Simplot v3.5.1; (B) Phylogenetic trees based on recombinant fragment a + c within SDWH86 and reference PRRSV strains; (C) Phylogenetic trees based on recombinant fragment b within SDWH86 and reference PRRSV strains. The blue region (a + c fragment) indicates that the major parent was HP-PRRSV, and the red region (b fragment) indicates that the minor parent was QYYZ. The new-branch PRRSV strains obtained in this study are labeled with red triangles (▲). The strains obtained from GenBank belonging to the same branch are marked with blue squares (■).