1. AP 8950 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. AP 8950 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 AP 8950 is similar to DuPuits. Flower color of Syn 2 generation is approximately 87% purple and 13% variegated, with traces of cream, white and yellow.
4. AP 8950 has high resistance to Fusarium wilt, Phytophthora root rot, spotted alfalfa aphid and pea aphid; resistance to 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 bacterial wilt and Aphanomyces (race 1) has not been determined.
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.