Genomic lineages of Rhizobium etli revealed by the extent of nucleotide polymorphisms and low recombination.

ABSTRACT:

Background

Most of the DNA variations found in bacterial species are in the form of single nucleotide polymorphisms (SNPs), but there is some debate regarding how much of this variation comes from mutation versus recombination. The nitrogen-fixing symbiotic bacteria Rhizobium etli is highly variable in both genomic structure and gene content. However, no previous report has provided a detailed genomic analysis of this variation at nucleotide level or the role of recombination in generating diversity in this bacterium. Here, we compared draft genomic sequences versus complete genomic sequences to obtain reliable measures of genetic diversity and then estimated the role of recombination in the generation of genomic diversity among Rhizobium etli.

Results

We identified high lev

SUBMITTER: Acosta JL 

PROVIDER: S-EPMC3215678 | biostudies-literature | 2011 Oct

REPOSITORIES: biostudies-literature