1. ZN 9534 is a 23 clone synthetic cultivar. Parent clones trace to 9 populations selected for resistance to the following pests: bacterial wilt, Fusarium wilt, Verticillium wilt, Phytophthora root rot, anthracnose (race 1) and Aphanomyces (race 1) plus two additional isolates. Phenotypic recurrent selection was used. Final selections were made from two-year old space plant selection nurseries near Napier, Iowa based on yield, winter survival, degree of leafhopper yellowing and stunting, freedom from leaf diseases fall dormancy reaction and stem protein and digestibility. Parentage traces to ABI 90FD(MF) (26%), ABI 9117A (24%), 91MF++, DK 122, Legend and Crown II (8% each), ABI 9129B, ABI 9137A and ABI 9138B (6% each). Estimated % germplasm sources contributing to the genetic constitution of this variety. M. falcata M. varia Flemish Chilean 7 6 21 19 32 5 Peruvian Indian African Arabian Unknown 6 0 0 0 4.
2. ZN9534 appears to be adapted to and is intended for use in the North Central Region of the U. S. . It has been tessted in Iowa, Wisconsin, Illinois and Minnesota.
3. Fall dormancy of ZN 9534 is similar to Ranger. Flower color of Syn 2 generation is approximately 66% purple and 33% variegated with a trace of cream, white and yellow.
4. ZN 9534 has high resistance to bacterial wilt, Fusarium wilt, Verticillium wilt, anthracnose (race 1), Phytophthora root rot and Aphanomyces (race 1) and moderate resistance to pea aphid It has not been tested for reaction to blue alfalfa aphid, spotted alfalfa aphid, stem nematode and root knot nematode.
5. Seed increase is limited to one generation each of breeder (Syn 1), foundation (Syn 2) and certified (Syn 3) seed classes. Certified seed may be produced from either breeder or foundation classes. A 2,3 and 6 year stand life is permitted on fields producing breeder, foundation and certified seed classes respectively. Foundation seed production is limited to the Pacific Northwest. Breeder seed was produced in 1995. ABI will maintain sufficient seed stocks for the life of the variety.
6. Certified seed will be available in 1998
7. Plant Variety Protection will not be applied for.
8. This information can be forwarded to the PVP office.
9. Variety Name: Date Submitted November 1997
Experimental Designations: ZN9534