ABI 9126
02/01/94

1. ABI 9126 is a synthetic variety with 96 parent clones. Parent clones trace to 29 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 three-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 Nordic (18%), Dawn (10%), Garst 645 (9%), Trident II and Venture (8% each), Genesis (6%), AP 8635B, AP 8832 and Clipper (4% each), Stine 9227 and Cutter (3% each) and Aggressor, AP 8821, AP 8822, AP 8830, AP 8834 and AP 8841 (2% each), with 11% tracing to numerous other sources. Approximate germplasm source contributions are: M. falcata (8%), Ladak (8%), M. varia (20%), Turkistan (17%), Flemish (32%), Chilean (7%), Peruvian (4%) and 4% unknown. Breeder seed (Syn 1) was produced on cuttings of the parental clones near Nampa, ID, in 1991. An equal number of cuttings (approximately 30) of each parental clone was transplanted at random into an isolated block and harvested in bulk.

2. ABI 9126 appears to be adapted to and is intended for use in the North Central United States. It has been tested in Iowa and Illinois.

3. Fall dormancy of ABI 9126 is similar to Vernal. Flower color of Syn 2 generation is approximately 68% purple and 32% variegated, with a trace of cream, white and yellow.

4. ABI 9126 has high resistance to bacterial wilt, Fusarium wilt, anthracnose (Race 1) and Phytophthora root rot; resistance to Verticillium wilt and Aphanomyces root rot (Race 1); moderate resistance to pea aphid; and low resistance to stem nematode. It has not been tested for reaction to spotted alfalfa aphid, blue alfalfa aphid or root knot nematode.

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 1991. 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.