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ABI 9045
1. ABI 9045 is a synthetic variety with 44 parent clones. Parent clones trace to 15 populations selected for resistance to the following pests: bacterial wilt, Fusarium wilt, Verticillium wilt, Phytophthora root rot, anthracnose (Race 1), and Aphanomyces root rot (Race 1). Phenotypic recurrent selection was used. Final selections were made from two-year-old space-plant selection nurseries near Marshfield and Livingston, WI, based on vigor, leafhopper yellowing resistance, leaf disease resistance, winter survival and fall dormancy reaction. Parentage traces to Dawn (18%), Venture (18%), Genesis(16%), Aggressor (11%), Garst 645 (9%), Nordic (9%), AP 8822 (7%), Trident II (5%), Stine 9227 (5%) and AP 8832 (2%). Approximate germplasm source contributions are: M. falcata (8%), Ladak (8%), M.varia (21%), Turkistan (16%), Flemish (30%), Chilean (7%), Peruvian (4%) and 6% unknown. Breeder seed (Syn 1) was produced on cuttings of the parental clones near Nampa, ID, in 1990. An equal number of cuttings (approximately 70) of each parental clone was transplanted at random into an isolated block and harvested in bulk. 2. ABI 9045 appears to be adapted to and is intended for use in the North Central United States. It has been tested in Iowa, Illinois and Idaho. 3. Fall dormancy of ABI 9045 is similar to Saranac. Flower color of Syn 2 generation is approximately 74% purple and 26% variegated, with a trace of cream, white and yellow. 4. ABI 9045 has high resistance to bacterial wilt, Verticillium wilt, Fusarium wilt, anthracnose (Race 1), Phytophthora root rot and pea aphid; resistance to Aphanomyces root rot (Race 1) and spotted alfalfa aphid; and moderate resistance to stem nematode. It has not been tested for reaction to root knot nematode or blue alfalfa aphid. 5. Seed increase is limited to one generation each of breeder (Syn 1), foundation (Syn 2) and certified (Syn 2 or 3) seed classes. Certified seed may be produced from either breeder or foundation classes. A 1, 3 and 6-year stand life is permitted on fields producing breeder, foundation and certified classes, respectively. Foundation seed production is limited to the Pacific Northwest. Breeder seed was produced in 1990. ABI will maintain sufficient seed stocks for the projected life of the variety. 6. Certified seed will be available in 1994. 7. Plant Variety Protection will not be applied for. 8. This information can be forwarded to the PVP office.
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