title: Scanning of genetic diversity of evolutionarily sequential Mycobacterium tuberculosis Beijing family strains based on genome wide analysis.
abstract: The Beijing family is an endemic lineage of Mycobacterium tuberculosis in eastern Asia. In Japan, five evolutionarily sequential sublineages composing the lineage have predominated. Comparative genomic sequencing based on a microarray technique was conducted for five representative strains of those respective sublineages. Results revealed approximately 200 point mutations specific to each strain. Subsequently, to investigate the genetic diversity of each sublineage, we analysed the phylogenetic divergence of 103 domestic strains belonging to them using genetic markers derived from the mutation information. Results show that the five sublineages have comprised smaller lineages which had diverged at various points. The smaller sub-sublineages have emerged with respective bottlenecks, which are reflected in the excessive monophyletic evolution of the species. Our data provide necessary information to grasp a comprehensive picture of genetic diversity of the lineage constructed in its evolution.
authors.affiliation: Department of Microbiology, Osaka City Institute of Public Health and Environmental Sciences, 8-34 Tojo-cho, Tennoji-ku, Osaka 543-0026, Japan. taka-wada@city.osaka.lg.jp
authors.forename: Takayuki
authors.initials: T
authors.lastname: Wada
authors.forename: Tomotada
authors.initials: T
authors.lastname: Iwamoto
authors.forename: Atsushi
authors.initials: A
authors.lastname: Hase
authors.forename: Shinji
authors.initials: S
authors.lastname: Maeda
mesh_terms: D002874:Chromosome Mapping; D004252:DNA Mutational Analysis; D019143:Evolution, Molecular; D014644:Genetic Variation; D016680:Genome, Bacterial; D058885:Multilocus Sequence Typing; D009169:Mycobacterium tuberculosis / Q000145:classification / Q000235:genetics*; D010802:Phylogeny; D017354:Point Mutation; D020641:Polymorphism, Single Nucleotide