ABI 9136
02/01/94

1. ABI 9136 is a synthetic variety with 53 parent clones. Parent clones trace to 24 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 Nordic, Dawn and Genesis (9% each), AP 8822, AP 8831, AP 8834, Venture and Dominator (6% each), Stine 9227, AP 8635B, AP 8730, Aggressor, AP 8821, AP 8824, AP 8832 and Clipper (4% each), with 11% tracing to numerous other sources. Approximate germplasm source contributions are: M. falcata (8%), Ladak (8%), M. varia (20%), Turkistan (15%), Flemish (32%), Chilean (8%), Peruvian (4%) and 5% unknown. Breeder seed (Syn 1) was produced on cuttings of the parental clones near Nampa, ID, in 1991. An equal number of cuttings (approximately 60) of each parental clone was transplanted at random into an isolated block and harvested in bulk.

2. ABI 9136 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 9136 is similar to Ranger. Flower color of Syn 2 generation is approximately 71% purple and 29% variegated, with a trace of cream, white and yellow.

4. ABI 9136 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), and moderate resistance to pea aphid and 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.