A transgenic European plum containing plum pox virus coat protein gene. Origin: Kearneysville, W.Va., by Ralph Scorza, Michel Ravelonandro, and Dennis Gonsalves, USDA-ARS Appalachian Fruit Research Station. Bluebyrd o.p. seedling transformed with Agrobacterium tumefaciens. USPP 15,154; issued 21 Sept. 2004; assigned to United States Department of Agriculture, Insitut National de la Recherche Agronomique and Cornell Research Foundation, Inc. Tree: large size; vigorous; upright; productive; blooms late March to mid-April; resistant to plum pox virus. Fruit: medium to large, 43-45 mm diameter, 60g; oval; skin blue, medium thickness; flesh yellow; firm; sweet, 21.5% SS; freestone; ripe mid August to early September in Kearneysville.
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