Australasian Plant Pathology

, Volume 37, Issue 6, pp 592–599 | Cite as

Characterisation of Phytophthora infestans populations from Vietnam

  • V. H. LeEmail author
  • X. T. Ngo
  • M. B. Brurberg
  • A. Hermansen


In 2002–03, 597 Phytophthora infestans isolates were collected from potato and tomato crops in nine provinces of Vietnam. A representative set of isolates were characterised for mating type, metalaxyl sensitivity, virulence, mitochondrial DNA (mt DNA) haplotype and RG57-fingerprint. All of the 294 tested isolates were of mating type A1. Metalaxyl-resistant isolates were found on both the potato and tomato hosts, and dominated the population in Lam Dong province (south of Vietnam). Nine known virulence genes were found among 27 tested isolates, although virulence to resistance gene R5 was not found. Among the 95 isolates tested for mtDNA haplotype, all were Ib type. Of these, all 34 isolates fingerprinted showed US-1-like genotype. Mating type, mtDNA haplotype and RG57-fingerprint data from this study indicate that the P. infestans population on tomato and potato from Vietnam still consist of the ‘old’ population.

Additional keyword

DNA fingerprinting 


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Copyright information

© Australasian Plant Pathology Society 2008

Authors and Affiliations

  • V. H. Le
    • 1
    Email author
  • X. T. Ngo
    • 2
  • M. B. Brurberg
    • 1
  • A. Hermansen
    • 1
  1. 1.Bioforsk — The Norwegian Institute for Agricultural and Environmental ResearchPlant Health and Plant Protection DivisionÅsNorway
  2. 2.Hanoi Agricultural UniversityHanoiVietnam

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