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Characterization of Erwinia amylovora strains using random amplified polymorphic DNA fragments (RAPDs)



Characterization of Erwinia amylovora strains using random amplified polymorphic DNA fragments (RAPDs)



Journal of Applied Microbiology 82(3): 389-398



The genetic diversity among 16 strains of Erwinia amylovora, chosen to represent different host plant origins and geographical regions, was investigated by RAPD analysis. One strain of Erwinia herbicola and one of Agrobacterium vitis were used as outgroups. Ninety-eight different RAPD fragments were produced by polymerase chain reaction amplification with six different 10-mer primers. RAPD banding profiles were found that enabled the Erw. amylovora strains to be distinguished from one another. Cluster analysis based on the number of RAPD fragments shared between strains showed that strains of Erw. amylovora isolated from subfamily Pomoideae formed a single group, whereas two strains from Rubus (subfamily Rosoideae) formed a second group. Two strains isolated from Asian pear on Hokkaido, Japan, formed a third group. Sets of RAPD fragments were identified that enabled each of the two host-range groups and one geographical region (Hokkaido) of Erw. amylovora strains to be unambiguously distinguished from one another and from the outgroups. This study shows that strains of Erw. amylovora exhibit genetic diversity detectable by RAPD analysis, and that molecular and statistical analysis of RAPD fragments can be used both to distinguish between strains and to determine relatedness between them.

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Accession: 002775170

Download citation: RISBibTeXText

PMID: 12455904

DOI: 10.1046/j.1365-2672.1997.00377.x


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