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. 2022 Apr 4;13:693196. doi: 10.3389/fmicb.2022.693196

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Copyright © 2022 Fan, Chen, Zhang, Deng, Wei, Zhao, Lv, Lin, Zhang, Wei, Huang, Wei and Mo.

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 maximum clade credibility tree and Bayesian skyline plot (BSP) of full-length genome sequences of infectious bronchitis viruses (IBVs) (see section “Materials and Methods” for further details). The maximum clade credibility (MCC) tree was constructed with 10% burn-in by Tree Annotator version 1.10.4 implemented in the BEAST software package. The color of the branches corresponds to geographical areas. A change in branch color indicates a time and geographical area change during the genotype’s evolutionary history. The scale bar represents the unit of time (year). Bayesian skyline plot (BSP) is superimposed to the tree in the same time-scale (x-axis). The y-axis represents the effective population size (log10 scale). The black line represents the effective population size through time, and the orange area around the line represents the 95% highest posterior density (HPD) of the estimates.