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A9503 1. A9503 is a 113-clone synthetic variety. Parent plants were selected using phenotypic recurrent selection for potato leafhopper tolerance and multifoliate expression in the field, and for resistance to one or more of the following pests: anthracnose (Race 1), aphanomyces root rot (Race 1), bacterial wilt, fusarium wilt, and phytophthora root rot. Parent plants trace to the varieties Achieva, GH-787, and 5333. Approximate germplasm sources are: M. falcata (6%), Ladak (6%), M. varia (27%), Turkistan (4%), Flemish (49%), Chilean (5%) and 3% unknown. 2. A9503 is adapted to, and intended for, use in the east central United States. It has been tested in Indiana, Illinois, Kentucky, Michigan, Ohio, Pennsylvania, Tennessee, and Virginia. 3. Fall dormancy of A9503 is similar to Ranger. Flower color is approximately 97% purple, 3% variegated, and a trace of white, cream, and yellow in the syn-1 generation. Multifoliolate expression is high in autumn growth.4. A9503 has high resistance to anthracnose (Race 1), bacterial wilt, fusarium wilt, Phytophthora root rot, pea aphid, and aphanomyces root rot (Race 1); resistance to Verticillium wilt and spotted alfalfa aphid; and moderate resistance to stem nematode. It has not been tested for reaction to blue alfalfa aphid or root-knot nematode. 5. See increase is limited to one generation of breeder (syn-1), two generations of foundation (syn-2 or –3), and three generations of certified (syn-2, -3, or –4) classes. Breeder seed was produced in 1995. Length of stand allowed is 2, 3, and 5 years for breeder, foundation, and certified production, respectively. FFR Cooperative will maintain sufficient seedstocks for the life of the variety. 6. Certified seed will be available in 2000. 7. Application will not be made for plant variety protection. 8. Information in this application may be forwarded to the PVP office. 9. Variety Name: Date Submitted: 1/99 Experimental Designation: A9503
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