Go to:
service menu

Julius Kühn-Institut (JKI)
Federal Research Institute
for Cultivated Plants

apl. Prof. Dr. Johannes Hallmann

Messeweg 11/12
38104 Braunschweig, Germany

Martina Ernst | Andrea Haberle-Kappei
Tel: +49(0)531 299-3701
Fax: +49(0)531 299-3006
ep@  julius-kuehn.  de

Institute leaflet
Institute booklet

Dr. Yahya Zakaria Abdou Gaafar

research scientist

Dr. Yahya Zakaria Abdou Gaafar
Tel: +49 (0)531 299 3718
Fax: +49 (0)531 299 3006 od. 3013

Julius Kühn-Institut
Messeweg 11/12
38104 Braunschweig

Area of research and tasks:

  • Virus/viroid detection and identification methods and molecular epidemiology.
  • Biological, morphological, serological, and molecular characterisation of viruses.
  • Virus-vector-host interactions (genomics and proteomics).
  • Molecular and biotechnological approaches for control of viral diseases.
  • Development and optimisation of methods for isolation, propagation, and purification of plant viruses and viroids.
  • Development and optimisation of diagnostic techniques for viruses and viroids.
  • Histological and cytological studies on virus-infected plants and viruliferous vectors.
  • High-throughput sequencing and bioinformatic analyses.


  • Dec 2019 Doctor of natural sciences
    Georg-August-Universität Göttingen
    Thesis: Plant virus identification and virus-vector-host interactions
  • Sep 2014 Master of Science
    Ghent University, Belgium
    Thesis: Caenorhabditis elegans - Orsay virus interaction: infection dynamics, antiviral inheritance, and genetic architecture of susceptibility
  • Jul 2007 Bachelor of Science in Agricultural sciences
    Cairo University, Giza, Egypt

Ongoing projects:

  • EUPHRESCO PRONC: Phytosanitary risks of newly introduced crops
  • TEMPER: The influence of temperature on the sensitivity of rapeseed varieties and genotypes to turnip yellows virus and pests
  • EUPHRESCO PHBN: Plant Health Bioinformatics Network

Memberships and other activities:

  • Member of Microbiology Society
  • Ad-hoc reviewer for Journal of Plant Pathology

Publications on ResearchGate

Publications on ORCID

Publications in the Julius Kühn-Institut