Genomic fingerprinting of virulent and avirulent strains of Clavibacter michiganensis subspecies sepedonicus

被引:16
作者
Brown, SE [1 ]
Reilley, AA [1 ]
Knudson, DL [1 ]
Ishimaru, CA [1 ]
机构
[1] Colorado State Univ, Dept Bioagr Sci & Pest Management, Ft Collins, CO 80523 USA
关键词
D O I
10.1007/s00284-001-0060-2
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Genomic fingerprints of C michiganensis subsp. sepedonicus were generated by CHEF gel electrophoresis of restriction digested high-molecular weight DNA. Low levels of intra-subspecific variation were detected by cluster analysis of the fingerprints. Four haplotypes were identified by genomic fingerprinting with HindIII, and eight were identified with EcoRI. Haplotypes generated with HindIII were less similar than those generated by EcoRI. Haplotypes generated with HindIII formed groups that corresponded well with plant reactions of the strains, but similar types of groupings were less apparent with haplotypes generated with EcoRI. When disease severity in eggplant and potato, population size in potato, and ability to induce a hypersensitive response (HR) in tobacco were overlaid onto dendograms of genetic similarity, avirulent HR-negative strains clustered separately from virulent HR-positive strains in both EcoRI and HindIII profiles. Avirulent HR-positive strains that lack pCS1 clustered with avirulent HR-negative strains in a EcoRI dendogram, but clustered with virulent HR-positive strains in a HindIII dendogram. Genomic fingerprinting of high-molecular weight DNA fragments provided a means for detecting genomic variability associated with virulence in C. michiganensis subsp. sepedonicus.
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收藏
页码:112 / 119
页数:8
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