A multilocus sequence analysis of Xanthomonas campestris reveals a complex structure within crucifer-attacking pathovars of this species

Is Predominant Clonal Evolution a Common Evolutionary Adaptation to Parasitism in Pathogenic Parasitic Protozoa, Fungi, Bacteria, and Viruses?

“…In Xanthomonas campestris, some MLGs pertaining to the same 'pathovar' have persisted worldwide from 1949 to 1981 (Fargier et al, 2011). X. campestris exhibits several clusters corroborated by both NJ tree and Splitstree, which could correspond to near-clades, although the evidence is based on only one marker (MLST).…”

“…McManus and Coleman (2014) b Edwards et al (2008) e Feretzaki and Heitman (2013) c Ngamskulrungroj et al (2009) b,e Fargier et al (2011) b,e…”

“…X. campestris exhibits several clusters corroborated by both NJ tree and Splitstree, which could correspond to near-clades, although the evidence is based on only one marker (MLST). The clusters correspond to the 'pathovars' (Fargier et al, 2011).…”

Contrasting recombination patterns and demographic histories of the plant pathogen Ralstonia solanacearum inferred from MLSA

“…The r/m values inferred on the whole R. solanacearum species complex (1.6 with 95% confidence interval 1.04-2.32) was higher than that obtained by Castillo and Greenberg (2007) (1.1 with 95% confidence interval 0.7-1.6), but within the range reported so far on plant pathogenic bacteria (P. syringae, P. viridiflava, X. campestris pv. campestris) (Vos and Didelot, 2008) using MLSA data (Silva et al, 2005;Yan et al, 2008;Doroghazi and Buckley, 2010;Fargier et al, 2011).…”

“…Among the recombination processes, the evolutionary importance of horizontal gene transfer has been highlighted by the tremendously increasing number of whole-genome sequences available (Martin and Beiko, 2010), and has mainly been studied on animal or human pathogenic bacteria (Achtman, 2008;Didelot and Maiden, 2010). Although some recent studies address this question on Pseudomonas syringae (Yan et al, 2008) or Xanthomonas campestris (Fargier et al, 2011), data are far less numerous on plant-associated bacteria, and more specifically plant pathogenic bacteria (Vos and Didelot, 2008).…”