Viral sanitary status and genetic diversity of Rupestris stem pitting - associated virus in french syrah clones exhibiting various susceptibility levels to decline
Résumé
Virus detection was realized in 22 clones of Syrah, chosen for their various susceptibility towards Syrah decline, by RT-PCR amplification. All these clones were free of 14 grapevine viruses whereas they all showed clearly the presence of RSPaV. The structures of RSPaV population in Syrah clones presenting opposite behaviours towards Syrah decline were studied. The putative implication of RSPaV in this syndrome is discussed.