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53V63 1. Parents of 53V63 were selected phenotypically for resistance to one of more of the following pests: bacterial wilt, Fusarium wilt, Verticillium wilt, Phytophthora root rot, Aphanomycesroot rot (races 1 and 2), spring blackstem, and potato leafhopper. In addition, parents were selected for forage yield, fall dormancy, and field appearance. 2. 53V63 is adapted to the north central and east central regions of the United States. It is intended for use in the north central, east central and Great Plains regions of the U.S. along with Ontario, Canada. It has been tested in Iowa, Illinois, Wisconsin, and Ontario, Canada. 3. 53V63 is a dormant cultivar with a fall dormancy similar to an FD-3 check. Flower color to in the syn2 generation is approximately 63% purple, 33% variegated and 4% yellow with traces of cream and white. 4. 53V63 has high resistance to anthracnose (race 1), bacterial wilt, Fusarium wilt, Phytophthora root rot, Verticillium. wilt, Aphanomyces root rot (race 1); resistance to pea aphid, potato leafhopper, stem nematode; and moderate resistance to spotted alfalfa aphid. 53V63 has not been tested for resistance to root knot nematode and blue alfalfa aphid. 5. Breeder seed (syn1) was produced in the greenhouse in the winter of 1996-97 and in cage isolation in 1997. Seed from all parents was bulked. Seed classes will be breeder (syn1), foundation (syn2 or 3), and certified (syn2, 3, or 4). Foundation seed may be produced from breeder or foundation seed. The second generation of foundation may be produced at the discretion of Pioneer Hi-Bred International, Inc. Limitations of age of stand will be three and five years respectively for foundation and certified seed. Pioneer Hi-Bred International, Inc. will maintain sufficient breeder seed and foundation seed for the projected life of the variety. 6. Certified seed of this variety will first be offered for sale in January 2000. 7. Application has been made for protection under the Plant Variety Protection Act, and the certification option will not be requested. 8 As a means of added varietal protection information in this application may be turned over to the PVP office. 9. Variety name: 53V63 Date submitted: November 30,1999 Experiment designations: Y53V63, W96PM63, LH2
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