Inferring evolutionarily significant units of bacterial diversity from broad environmental surveys of single-locus data

AUTOR(ES)

Barraclough, Timothy G.

FONTE

The Royal Society

RESUMO

By far the greatest challenge for diversity studies is to characterize the diversity of prokaryotes, which probably encompasses billions of species, most of which are unculturable. Recent advances in theory and analysis have focused on multi-locus approaches and on combined analysis of molecular and ecological data. However, broad environmental surveys of bacterial diversity still rely on single-locus data, notably 16S ribosomal DNA, and little other detailed information. Evolutionary methods of delimiting species from single-locus data alone need to consider population genetic and macroevolutionary theories for the expected levels of interspecific and intraspecific variation. We discuss the use of a recent evolutionary method, based on the theory of coalescence within independently evolving populations, compared with a traditional approach that uses a fixed threshold divergence to delimit species.

Documentos Relacionados

• The Maintenance of Single-Locus Polymorphism. IV. Models with Mutation from Existing Alleles
• Mutant mouse tottering: selective increase of locus ceruleus axons in a defined single-locus mutation.
• Single-Locus Modification of Position-Effect Variegation in DROSOPHILA MELANOGASTER. I. White Variegation
• The Maintenance of Single-Locus Polymorphism. I. Numerical Studies of a Viability Selection Model
• Inherited Biochemical Variation in DROSOPHILA MELANOGASTER: Noise or Signal? I. Single-Locus Analyses