Transgenic rootstock line
Nº of plants challenged for a second time with PPV Nº of plants challenged for a second time with PPV RT-PCR + same cycle after 8 weeks RT-PCR + same cycle after 8 weeks RT-PCR + same cycle after 13 weeks RT-PCR + same cycle after 13 weeks Switch % from RT-PCR positive to negative Switch % from RT-PCR positive to negative
St5’-1 St5’-1 10 10 10 10 5 5 50.0
St5’-6 St5’-6 9 9 9 9 5 5 44.4
St5’-9 St5’-9 9 9 9 9 4 4 55.6