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Deoxyribonucleic acid relatedness of 24 xanthomonad strains representing 23 Xanthomonas campestris pathovars and Xanthomonas fragariae
Author(s) -
Hildebrand D.C.,
Palleroni N.J.,
Schroth M.N.
Publication year - 1990
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1990.tb02573.x
Subject(s) - xanthomonas campestris , pathovar , xanthomonas , biology , pseudomonadaceae , microbiology and biotechnology , genomic dna , host (biology) , genetics , dna , botany , pseudomonas aeruginosa , bacteria
Twenty Xanthomonas campestris pathotype strains, three non‐pathotype strains, and one strain of X. fragariae were studied by S1 DNA:DNA hybridization tests. The results of these tests do not support the retention of X. campestris as a single species. DNA reassociation values among many of the strains were low. Three clusters of closely related strains were observed, but nine strains did not cluster. Xanthomonas campestris pv. secalis was more closely related to X. fragariae than to any other X. campestris pathovar. Mapping the host family upon a three‐dimensional genomic distance matrix of the xanthomonads suggested that strains attacking the same plant family usually show some relationship, but only a distant one. Thus, pathogenicity toward members of the same host family is not a measure of the genomic relationships of xanthomonads.