Fig. 2: The Canidae family could be a possible host of the direct progenitor of variant B.1.1.7.
From: Potential transmission chains of variant B.1.1.7 and co-mutations of SARS-CoV-2
The digits on the left of the figure indicate the labels of mutations, which correspond with the mutation labels in Fig. 1a. The strains shown in the center of the figure contain at least one spike mutation of variant B.1.1.7. Moreover, these strain examples cover all existing SARS-CoV-2 viruses that collected from animal hosts. The strain labeled by orange star corresponds with the star variant in Fig. 1a. The strain with orange solid-round label was collected from a dog on 2020-07-28. Such two strains share the same mutations “56” and have the minimum phylogenetic distance by MEGA tool. Canidae, Mustelidae or Felidae, especially the Canidae family (e.g., dog) could be a possible host of the direct progenitor of variant B.1.1.7 based on the existing stains collected before the end of 2021-01.
