Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 47 (4), 1145-56

Discovery and Classification of Ecological Diversity in the Bacterial World: The Role of DNA Sequence Data


Discovery and Classification of Ecological Diversity in the Bacterial World: The Role of DNA Sequence Data

T Palys et al. Int J Syst Bacteriol.


All living organisms fall into discrete clusters of closely related individuals on the basis of gene sequence similarity. Evolutionary genetic theory predicts that in the bacterial world, each sequence similarity cluster should correspond to an ecologically distinct population. Indeed, surveys of sequence diversity in protein-coding genes show that sequence clusters correspond to ecological populations. Future population surveys of protein-coding gene sequences can be expected to disclose many previously unknown ecological populations of bacteria. Sequence similarity clustering in protein-coding genes is recommended as a primary criterion for demarcating taxa.

Similar articles

  • A Systematics for Discovering the Fundamental Units of Bacterial Diversity
    FM Cohan et al. Curr Biol 17 (10), R373-86. PMID 17502094. - Review
    Bacterial systematists face unique challenges when trying to identify ecologically meaningful units of biological diversity. Whereas plant and animal systematists are gui …
  • Bacterial Species and Speciation
    FM Cohan. Syst Biol 50 (4), 513-24. PMID 12116650. - Review
    Bacteria are profoundly different from eukaryotes in their patterns of genetic exchange. Nevertheless, ecological diversity is organized in the same way across all of lif …
  • What Are Bacterial Species?
    FM Cohan. Annu Rev Microbiol 56, 457-87. PMID 12142474. - Review
    Bacterial systematics has not yet reached a consensus for defining the fundamental unit of biological diversity, the species. The past half-century of bacterial systemati …
  • Sequences, Sequence Clusters and Bacterial Species
    WP Hanage et al. Philos Trans R Soc Lond B Biol Sci 361 (1475), 1917-27. PMID 17062411. - Review
    Whatever else they should share, strains of bacteria assigned to the same species should have house-keeping genes that are similar in sequence. Single gene sequences (or …
  • Diversity and Depth-Specific Distribution of SAR11 Cluster rRNA Genes From Marine Planktonic Bacteria
    KG Field et al. Appl Environ Microbiol 63 (1), 63-70. PMID 8979340.
    Small-subunit (SSU) ribosomal DNA (rDNA) gene clusters are phylogenetically related sets of SSU rRNA genes, commonly encountered in genes amplified from natural populatio …
See all similar articles

Cited by 92 PubMed Central articles

See all "Cited by" articles

Publication types

LinkOut - more resources