1. Rambo is a synthetic variety with 87 parent clones 8. This information can be forwarded to the PVP office. Parent clones trace to 40 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 plus two additional isolates). Phenotypic recurrent selection was used. Final selections we 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, fall dormancy reaction and high stem protein. Parentage traces to Garst 6451 Nordic and ABI 9024W (7% each) Quantum, Evolution and Arrow (6% each) Apollo, Stine 9227, Cutter, AP 8622 and ABI 9022X (4% each), Venture, Dominator, Genesis, AP 8925W, AP 8926X and AP8936X (3% each), Garst 636, Surpass, Starmaster, Impact, Green Field, Imperial, Allegro, ABI 9020X ABI 9021X, ABI 9031X and ABI 9042(2% each) with 1 % from Apollo Supreme. . Breeder seed (Syn 1) was produced on cuttings of the parental clones near Nampa, ID in 1991 An equal number of cuttings (approx. 30) of each parental clone was transplanted at random into an isolated field and harvested in bulk. The % of the germplasm sources listed below contribute to the major genetic constitution of this variety. M. falcata Ladak M. varia Turkistan Flemish Chilean 7 8 19 22 29 7 Peruvian Indian African Arabian Unknown 6 0 0 0 2
2. Rambo appears to be adapted to and is intended for use in the North Central Region of the U. S. . It has been tested in IA, IL, WI and ID.
3. Fall dormancy of Rambo is similar to Ranger. Flower color of Syn 2 generation is approximately 69% purple and 31% variegated, with a trace of cream, white and yellow.
4. Rambo has high resistance to bacterial wilt, Fusarium wilt, anthracnose (Race 1), and Phytophthora root rot, resistance to Verticillium wilt, stem nematode, pea aphid and Aphanomyces root rot (Race 1), moderate resistance to spotted alfalfa aphid and is susceptible to blue alfalfa aphid. It has not been tested for resistance to root knot nematode.
5. Seed increase is limited to one generation each of breeder (Syn 1), foundation (Syn 2) and certified (Syn 3) seed Certified seed may be produced from either breeder or foundation classes. A 1,3 and 6-year strand life is permitted on fields producing breeder, foundation and certified class, respectively. Foundation seed production is limited to the Pacific Northwest. Breeder seed was produced in 1992. ABI will maintain sufficient seed stock for the projected life of the variety.
6. Certified seed will be available in 1995.
7. Plant variety protection will not be applied for.
8. This information can be forwarded to the PVP office.
9. Variety name: Rambo
Experimental designations ABI 923DD
Date NA&MLVRB first accepted this variety: 1994
Dates previous amendments were accepted: 1995
Date this amendment submitted: November 25, 1997.