VS-446
(Experimental Desig.)
1. VS-446 was developed by phenotypic recurrent selection for resistance to the blue alfalfa aphid, Phytophthora root rot, or anthracnose. Parentage traces predominately to UC Cibola, Pierce, UC 123, UC 143, and Valador. Estimates of the major germplasms sources that constitute this variety are: Ladak (1%), M. varia (2%), Turkistan (9%), Flemish (1%), Chilean (13%), Peruvian (2%), Indian (9%), African (42%), and unknown (21%).
2. VS-446 is intended for use in the southern San Joaquin Valley and the Imperial Valley in California and similar low desert areas of Arizona for hay, haylage, or dehy production. VS-446 has been tested in California and Arizona.
3. VS-446 is a very nondormant variety with fall dormancy similar to CUF 101. Flower color is approximately 98% purple and 2% variegated.
4. VS-446 has high resistance to the spotted alfalfa aphid and Fusarium wilt; resistance to the blue alfalfa aphid, pea aphid, and Phytophthora root rot; and low resistance to anthracnose. Reactions to bacterial wilt, Verticillium wilt, and stem nematode are unknown.
5. Seed increase of VS-446 is on a limited-generation basis with one generation each of breeder and certified seed classes, and up to two generations of foundation seed. Breeder seed (Syn 1), foundation seed (Syn 2 or Syn 3), and certified seed (Syn 3 or Syn 4) classes will be recognized. Breeder seed (Syn 1) was produced in an isolated field near Woodland, CA in 1984. Sufficient foundation seed for the projected life of this variety will be maintained by Vista. Production of Syn 3 foundation seed requires consent of the breeder. Stands of foundation and certified seed fields are limited to 3 and 6 years, respectively.
6. Certified seed of VS-446 will be available in 1989.
7. No decision has been made regarding Plant Variety Protection (PVP).
8. This information can be forwarded to the PVP office.