Stability of gene silencing-based resistance to <Emphasis Type="Italic">Plum pox virus</Emphasis> in transgenic plum (<Emphasis Type="Italic">Prunus domestica</Emphasis> L.) under field conditions
(1) USDA-ARS Appalachian Fruit Research Station, 2217 Wiltshire Rd., West Virginia, USA;(2) Institute of Pomology and Floriculture, 96-100 skierneiwice, Poland;(3) INRA-Bordeaux, UMR GDPP-Virologie, Villenave d'Ornon, France