CW 59128

1. CW 59128 is a synthetic variety with 87 parent plants which were selected from three year old Mexico yield tests. Selections were made from commercial varieties and 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 59128 traces to the following germplasm sources: Grasis, Topacio, Altiva, Almar, Mecca, ICI 990, 5929, and WL 605. Approximate germplasm source contributions are as follows: M.varia (2%), Turkistan (10%), Flemish (1%), Chilean (8%), Peruvian (3%), Indian (20%), African (50%), and Unknown (6%).

2. CW 59128 is adapted to the Southwestern area of the U.S. and Mexico and is intended for use in the Southwestern U.S., Mexico, and Argentina. CW 59128 has been tested in California and Mexico.

3. CW 59128 is a very nondormant variety with fall dormancy similar to CUF 101. Flower color observed in the Syn.2 generation is greater than 99% purple, with a trace of variegated, cream, white, and yellow.

4. CW 59128 has high resistance to Fusarium wilt, Phytophthora root rot, spotted alfalfa aphid, and blue alfalfa aphid, with resistance to pea aphid and stem nematode, and moderate resistance to anthracnose (race 1) and Verticillium wilt. Reaction to bacterial wilt, Aphanomyces root rot (race 1), and root knot nematode has not been adequately tested.

5. Seed increase of CW 59128 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 field isolation near Celaya, Mexico in 1995. 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 59128 will be available in 1999.

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: December 1, 1998.