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24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

Menu Logo Principal

PVY Organization

Zone de texte éditable et éditée


International Potato Center (CIP)

CIP is an International Agricultural Research Organization. Our vision is roots and tubers improving the lives of the poor.


The mission of CIP is to work with partners to achieve food security, well-being, and gender equity for poor people in root and tuber farming and food systems in the developing world. We do this through research and innovation in science, technology, and capacity strengthening.

We study viruses of potato, sweetpotato and other Andean root and tuber crops in Peru and worldwide, but also conduct research into virus resistance, bacterial wilt of potato and late blight, develop novel diagnostic methods, and tools for surveillance and risk assessment.


Current projects

  • The Peruvian potato virome
  • The virome of other Andean root and tuber crops
  • Improved diagnostic tools for sweetpotato virus detection
  • Next generation phytosanitation : rapid detection and elimination of viruses from root and tuber crops
  • Improved Diagnostics and Genotypic/Epidemiological Mapping Potato Bacterial Wilt Disease in East Africa
  • Quorum quenching for enhanced resistance to bacterial wilt disease
  • Virus transmission models for emerging viruses and forecasting in the face of climate change


Jan Kreuze (Head of the team)

Jan Kreuze


Tel.: +51 1 3496017 ext 3054


  • Lima : 2 scientist,, 1 assistant, 1 technician, 5 students 
  • Kenya : 1 scientist, 1 student


  • Small RNA sequencing and assembly
  • LAMP
  • Tube-arrays
  • Serology
  • qRT-PCR
  • Risk modeling
  • Diagnostics

Selected publications

  • Zheng Y, Gao S, Padmanabhan C, Li R, Galvez M, Gutierrez D, Fuentes S, Ling, Kai-Shu; Kreuze J, Fei Z (2016) An automated pipeline for efficient virus discovery using deep sequencing of small RNAs. Virology,
  •  Untiveros M, Olspert A, Artola K, Firth AE, Kreuze JF and Valkonen JPT (2016) A novel sweet potato potyvirus ORF is expressed via polymerase slippage and suppresses RNA silencing. Molecular Plant Pathology 17(7):1111-23, DOI: 10.1111/mpp.12366
  •  Kyndt T, Quispe D, Zhai H, Jarret RL, Ghislain M, Q-C Liu, Gheysen G, Kreuze JF (2015) The genome of cultivated sweetpotato contains Agrobacterium T-DNAs with expressed genes: an example of a naturally transgenic food crop Proceedings of the National Academy of Sciences USA 112, 18: 5844–5849, doi: 10.1073/pnas.1419685112
  •  Kreuze, J.F., Pérez, A., Untiveros, M., Quispe, D., Fuentes, S., Barker, I., Simon, R. (2009) Complete viral genome sequence and discovery of novel viruses by deep sequencing of small RNAs: a generic method for diagnosis, discovery and sequencing of viruses. Virology 388: 1-7 DOI 10.1016/j.virol.2009.03.024
  •  Cuellar, W.J., Kreuze, J.F., Rajamäki, M.L., Cruzado, K.R., Untiveros, M., and Valkonen, J.P.T. (2009) Elimination of antiviral defense by viral RNase III. Proceedings of the National Academy of Sciences USA 106: 10354-10358 DOI 10.1073/pnas.0806042106