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Bacterialblightofrice,causedby Xanthomonasoryzaepv.Oryzae(Xoo.),isoneofthemajorricediseasesinChina.Makingcleartheshiftofgeneticdiversityofthepathogenwillprovideimportantinformationforricebreed ing.Strainscollectedfrom11provinceslocatedinSouth ernregionoft