1. CW 76120 is a synthetic variety with 135 parent plants that were selected for aphid resistance, drought tolerance, frost tolerance, persistence and agronomic characteristics from space planted nurseries and yield trials in Argentina. Parent plants were selected from various populations which were developed by a combination of phenotypic recurrent selection and strain crossing with selection for resistance to one or more of the following pests: Fusarium wilt, Verticillium wilt, Phytophthora root rot, anthracnose (race 1), spotted alfalfa aphid, blue alfalfa aphid, and stem nematode. Parentage of CW 76120 traces to SPS 6550, DK 166, Express, Aspire, Archer, AlfaStar, BigHorn, and miscellaneous Cal/West Seeds breeding populations. Approximate germplasm source contributions are as follows: M.falcata (1%), Ladak (2%), M.varia (9%), Turkistan (15%), Flemish (27%), Chilean (11%), Peruvian (2%), Indian (10%), and African (23%).
2. CW 76120 is adapted to and intended for use in the Moderately Winterhardy Intermountain and Southwest areas of the U.S. and Argentina. CW 76120 has been tested in California and Argentina.
3. CW 76120 is a moderately dormant variety with fall dormancy similar to FD class 6 check varieties. Flower color observed in the Syn.2 generation is approximately 98% purple and 2% variegated, with a trace of white, cream, and yellow.
4. CW 76120 has high resistance to anthracnose (race 1), Fusarium wilt, Phytophthora root rot, pea aphid, spotted alfalfa aphid, and blue alfalfa aphid, with resistance to Verticillium wilt, stem nematode, and northern root knot nematode (Meloidogyne hapla, and moderate resistance to bacterial wilt. Reaction to Aphanomyces root rot (race 1) has not been adequately tested.
5. Seed increase of CW 76120 is on a limited generation basis with one generation of breeder and two generations of the foundation and certified seed classes. Breeder (Syn.1), foundation (Syn.2 or Syn.3), and certified (Syn.3 or Syn.4) classes will be recognized. Production of Syn.3 foundation seed requires consent of the breeder. Breeder seed was produced under cage isolation near Mendoza, Argentina in 1997. Sufficient foundation seed for the projected life of the variety will be maintained by Cal/West Seeds. Stands of foundation and certified seed fields are limited to 3 and 6 years, respectively.
6. Certified seed of CW 76120 will be available in 2003.
7. No decision has been made regarding Plant Variety Protection.
8. This information can be forwarded to the PVP office.
9. Variety Name: Date submitted: November 30, 2002.
Experimental Designation: CW 76120.