Figure 1. MG-phylogenetic cladogram Yersinia pestis [15]. Environmental discrepancies are indicated by icons (see explanations in the text). ●–dubious subspecies; ○–the transformation of the ‘vole’ subspecies (0.PE) into the ‘marmot’ subspecies (0.ANT) on the eve of the 1st pandemic; □–polytomy in Mongolian marmot (Marmota sibirica) populations on the eve of the 2nd pandemic; ∆–development of ‘rat’ genovariants (1.ORI) from ‘marmot’ genovariants (1.IN) in Yunnan; ?–extinction of ‘archaeological subspecies' (not justified ecologically [18]). The dotted oval outlines genetic ‘speciation’ changes in the genome of the pseudotuberculous ancestor of the plague microbe.
