Molecular Characterization and Epidemiology of Ralstonia solanacearum Race 3 biovar 2 Causing Brown Rot of Potato in Mauritius

Molecular Characterization and Epidemiology of Ralstonia solanacearum Race 3 biovar 2 Causing Brown Rot of Potato in Mauritius

Outbreaks of brown rot disease caused by Ralstonia solanacearum Race 3 biovar 2 have resulted in losses of 291 t of potato, worth approximately USD 171 000 since 2005 over three growing seasons. The gradual spread of this quarantine disease in Mauritius has warranted a study of the population of the...

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Bibliographic Details
Published in:Journal of phytopathology Vol. 158; no. 7-8; pp. 503 - 512
Main Authors: Khoodoo, Michel Hans Rodney, Ganoo, Edhabye Shandra, Saumtally, Abdess Salem
Format: Journal Article
Language:English
Published: Oxford, UK Oxford, UK : Blackwell Publishing Ltd 01-08-2010
Blackwell Publishing Ltd
Blackwell
Subjects:
Bacterial plant pathogens
Biological and medical sciences
Brown rot
clonal structure
Data processing
Epidemiology
Fundamental and applied biological sciences. Psychology
genomics
Nucleotides
Pathogens
Phytopathology. Animal pests. Plant and forest protection
Polymerase chain reaction
Population studies
Primers
Quarantine
Races
Ralstonia solanacearum
Ralstonia solanacearum race 3 biovar 2
Solanum tuberosum
Indian Ocean Islands
Mauritius
clonal structure
Plant pathology
Plant pathogen
Ralstonia solanacearum
Solanum tuberosum
Ralstonia solanacearum race 3 biovar 2
Genotype
epidemiology
Dicotyledones
brown rot
Angiospermae
Molecular epidemiology
Bacteria
Spermatophyta
Tuber plant
Solanaceae
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Summary:Outbreaks of brown rot disease caused by Ralstonia solanacearum Race 3 biovar 2 have resulted in losses of 291 t of potato, worth approximately USD 171 000 since 2005 over three growing seasons. The gradual spread of this quarantine disease in Mauritius has warranted a study of the population of the pathogen. The epidemiological and ecological groupings of R. solanacearum isolated from outbreaks in Mauritius from 2005 to 2008 were examined following a study of their genetic relatedness by PCR-based marker amplified with REP and IS1112 PCR primers. The band-based genomic fingerprint data clustered strains in two major groups B and C, and one minor group A. Group B comprised exclusively of strains that caused the outbreaks in 2008 and appeared to originate from a different clonal lineage from strains clustered in groups A and C. Nucleotide polymorphisms within each group and shared markers suggest that group B strains could represent a novel introduction of the pathogen compared to the initial population of strains responsible for the outbreaks in 2005 and 2006. The clustering of strains isolated from imported ware potatoes obtained from the local market support the hypothesis that this could be a source of entry of the pathogen in Mauritius.
Bibliography:http://dx.doi.org/10.1111/j.1439-0434.2009.01654.x
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ArticleID:JPH1654
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content type line 23
ISSN:0931-1785
1439-0434
DOI:10.1111/j.1439-0434.2009.01654.x