1. ZX 9453 is a synthetic variety with 400 parental clones. Parent clones trace one population selected for resistance to phytophthora root rot, anthracnose, bacterial wilt, fusarium wilt, verticillium wilt, blue alfalfa aphid, spotted alfalfa aphid, pea aphid, stem nematode, and northern root knot nematode. Recurrent phenotypic selection was used . Final selections were made from two and three year old nurseries near Nampa, Idaho, based on overall root and crown health.
2. ZX 9453 appears to be adapted to winter hardy intermountain region of the U.S. It is intended for use in the winter hardy region of the U.S. to produce stored feed.
3. ZX 9453 is Moderately dormant similar to the FD 5 check. Flower color is approximately 88¡/. purple and 9% variegated, 1% cream, 1% yellow and 1% white.
4. ZX 9453 has high resistance to fusarium wilt, spotted alfalfa aphid, and stem nematode; resistance to bacterial wilt, verticillium wilt, phytophthora root rot, pea aphid, and blue alfalfa aphid; moderate resistance to anthracnose (race1), and northern root knot nematode. Aphanomyces root rot resistance levels has not been determined.
5. Seed increase is limited to one generation of breeder seed (Syn 1), two generations of foundation and two to three generations of certified seed. 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 1994 near Nampa, Idaho under field isolation. ABI will maintain sufficient stocks for the projected life of the variety.
6. Certified seed will be available in 2002
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 21,2001
Experimental designations: ZX 9453