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Deoxyribonucleic Acid Relatedness Among Species of Erwinia and Between Erwinia Species and Other Enterobacteria

¹ Division of Biochemistry, Walter Reed Army Institute of Research, Washington, D.C. 20012

ABSTRACT

Relatedness in species of Erwinia was assessed by determining the extent of reassociation in heterologous deoxyribonucleic acid preparations. Thermal elution chromatography on hydroxyapatite was used to separate reassociated nucleotide sequences from nonreassociated sequences and to determine the thermal stability of related nucleotide sequences. An apparent 15% core of relatedness is present between fire blight, soft-rot, and "atypical" Erwinia species. All Erwinia species showed low to moderate reaction with representative enteric bacteria.

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