Orig. in Urbana, Ill., by the Agr. Expt. Stations of Illinois, New Jersey, and Indiana and the U.S. Dept. of Agriculture. Responsible parties were D.F. Dayton and J.B Mowry of Illinois; L.F. Hough and Catherine Bailey of New Jersey; and E.B. Williams, Jules Janick, and F.H. Emerson of Indiana. Introd. in 1970. Ill. seedling 14-510 × N.J. seedling 123249. Cross made in 1957, selected in 1963; tested as Co-op 2 and 1225-100. <b>Fruit:</b> size medium; slightly oblate, slightly lopsided; skin 60% to 95% bright-red blush over yellow ground cover, thick, medium tough, smooth, waxy, attractive, dots small to medium, no russeting; flesh yellow, crisp, flavor mediocre, subacid, texture coarse, quality mediocre; tends to have bitter pit; ripens 3 weeks before Jonathan, 1 month before Delicious; recommended for dessert use. <b>Tree:</b> size medium on standard rootstock, spreading; vigor good; hardy; productivity good; carries Vf gene for resistance to apple scab; tolerant to fire blight and apple blotch; adapted to central and southern Midwest of the U.S. The prefix PRI in the name is an acronym from the three institutions involved: Purdue, Rutgers, and Illinois.