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. 2019 Oct 30;50:87. doi: 10.1186/s13567-019-0707-2

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© The Author(s) 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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MCC trees of H3N8 CIV other gene segments. The MCC trees were reconstructed based on refined subsets of gene sequences from all CIV and closely related EIV sequences using the HKY + gamma nucleotide substitution model and lognormal relaxed clock. The skyline coalescent model length chain was set at 1 × 10⁸ in length and re-sampled every 1 × 10⁴ steps (A: M1; B: NP; C: NS1; D: PA; E: PB1; F: PB2).