1. Nemagone is a synthetic variety with 821 parent clones. Parent clones trace to 4 populations selected for resistance to Phytophthora root rot, anthracnose, bacterial wilt, fusarium wilt, verticillium wilt, blue alfalfa aphid, spotted alfalfa aphid, stem nematode and northern root knot nematode. Recurrent phenotypic selection was used. Final selections were made from 2- and 3- year old yield trials at Napier,Iowa based on overall root and crown health. Parentage traces to experimentals closely related to Archer (58%) and Lobo (42%). Breeder seed (Syn 1) was produced on cuttings of the parental clones near Nampa, Idaho, in 1989. Approximate germplasm source contributions are: M. falcata (6%), Ladak (6%),M. varia (19%), Turkistan (13%), Flemish (30%), Chilean (9%), Peruvian (2%),Indian (2%), African (1%), with 12% from unknown sources.
2. Nemagone appears to be adapted to and is intended for use in southeastern Idaho and northern California It has been tested in California, Idaho, Oklahoma and Kansas.
3. Fall dormancy of Nemagone is similar to Depuits. Flower color of Syn 2 generation is approximately 86% purple and 13% variegated, with traces of cream, white, and yellow.
4. Nemagone has high resistance to Fusarium wilt, Phytophthora root rot, spotted alfalfa aphid and pea aphid resistance to bacterial wilt, Verticillium wilt, anthracnose (race 1) and southern root knot nematode; moderate resistance to stem nematode and northern root knot nematode; and low resistance to blue alfalfa aphid. Reaction to Aphanomyces (race 1 ) has not
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 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 1989. ABI will maintain sufficient seed stocks for the projected life of the variety.
6. Certified seed will be available in 1993.
7. Plant Variety Protection will not be applied for.
8. This information can be forwarded to the PVP office.