A single resistance factor to solve vineyard degeneration due to grapevine fanleaf virus

Abstract Grapevine fanleaf disease, caused by grapevine virus (GFLV), transmitted the soil-borne nematode Xiphinema index , provokes severe symptoms and economic losses, threatening vineyards worldwide. As no effective solution exists so far to control disease in an environmentally friendly way, we investigated presence of resistance GFLV genetic resources. We discovered that Riesling variety displays GFLV, although it is susceptible X. . This determined a single recessive factor located on chromosome 1, which have named rgflv1 The discovery paves way for first through development new GFLV-resistant rootstocks, was hitherto unthinkable prospect. Moreover, putatively distinct from susceptibility factors already described plants.