Figure 2

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).