PMC

Population snapshot of 231 Medicago-nodulating rhizobia derived from the allelic variation of 10 chromosomal loci. A matrix of the ST followed by the allele labels for each was used in eBURST () to generate a diagram of the evolutionary patterns among the strains. The snapshot was produced by setting the group definition to 0/10 genes. The sizes of the circles are related to the numbers of strains within each ST. The founder and cofounder genotypes are colored blue and red, respectively. Distances between STs indicated by connecting lines are arbitrary.

Linkage distance among 231 Medicago-nodulating rhizobia derived from allelic variation among 10 chromosomal loci. A matrix of the strain identification and the ST followed by the allele labels for each was used in the START (Sequence Type Analysis and Recombinational Tests, version 1.05) program to generate the UPGMA dendrogram. The program was written by Keith Jolley, University of Oxford (). MLST group affiliation is indicated. Singletons are identified by an “s”; ST numbers followed by a blank belong to group 1.