AUTHOR=Aritua Valente , Harrison James , Sapp Melanie , Buruchara Robin , Smith Julian , Studholme David J. 

TITLE=Genome sequencing reveals a new lineage associated with lablab bean and genetic exchange between Xanthomonas axonopodis pv. phaseoli and Xanthomonas fuscans subsp. fuscans

JOURNAL=Frontiers in Microbiology

VOLUME=6

YEAR=2015

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2015.01080

DOI=10.3389/fmicb.2015.01080

ISSN=1664-302X

ABSTRACT=<p>Common bacterial blight is a devastating seed-borne disease of common beans that also occurs on other legume species including lablab and Lima beans. We sequenced and analyzed the genomes of 26 strains of <italic>Xanthomonas axonopodis</italic> pv. <italic>phaseoli</italic> and <italic>X. fuscans</italic> subsp. <italic>fuscans</italic>, the causative agents of this disease, collected over four decades and six continents. This revealed considerable genetic variation within both taxa, encompassing both single-nucleotide variants and differences in gene content, that could be exploited for tracking pathogen spread. The bacterial strain from Lima bean fell within the previously described Genetic Lineage 1, along with the pathovar type strain (NCPPB 3035). The strains from lablab represent a new, previously unknown genetic lineage closely related to strains of <italic>X. axonopodis</italic> pv. <italic>glycines</italic>. Finally, we identified more than 100 genes that appear to have been recently acquired by <italic>Xanthomonas axonopodis</italic> pv. <italic>phaseoli</italic> from <italic>X. fuscans</italic> subsp. <italic>fuscans</italic>.</p>