The reaction of the transgenic plum pox virus (PPV) resistant C-S plum was studied under conditions of co-infection with Prunus necrotic ringspot virus (PNRSV) and PPV as may he encountered in the field. C-S and controls were inoculated with PPV and PNRSV following several co-infection schemes. The results of this preliminary study showed that, as expected, the transgenic clones, including C-S ...

S. Jacob, E. Vangdal, A. Torricelli, L. Spinelli, M. Vanoli, P. Eccher Zerbini, L.M.M. Tijskens and E. Madieta 1 Laboratoire GRAPPE, Groupe-ESA, Angers, France 2 CRA-IAA, Unità di ricerca per i processi dell’industria agroalimentare (Agricultural Research Council Research Unit for Agro Food Industry formerly CRA-IVTPA), Italy 3 Bioforsk Vest Ullensvang, Lofthus, Norway 4 CNR-INFM and CNR-IFN, P...

Research to date indicates that post-transcriptional gene silencing (PTGS) is an effective strategy for the development of stable high-level resistance to Plum pox virus in plum. Field tests in Poland, Romania, and Spain show that after 5–6 years of natural aphid vectored inoculation, trees of the PTGS clone C5 remain virus-free. The effectiveness of transgene-based PTGS for imparting potyvirus...