MOESM3 of Evolution of infectious bronchitis virus in the field after homologous vaccination introduction

Additional file 3. Time scaled phylogenetic trees reconstructed using the QX sequences obtained in the present study. The ancestral history of the amino acids detected under episodic directional selection has been reconstructed over time through a discrete trait analysis using the Bayesian approach implemented in BEAST1.8. Each tree has been color coded to depict the evolution of one of the considered amino acids.