CW4958
1. CW 4958 is a synthetic variety with 134 parent plants which were selected sequentially for resistance to Phytophthora root rot, Anthracnose (race 1), and seed yield. Parent plants were selected from crosses between selections from various populations developed by a combination of phenotypic recurrent selection and strain crossing with selection for one or more of the following pests: Fusarium wilt, Verticillium wilt, anthracnose (race 1), Phytophthora root rot, blue alfalfa aphid, and spotted alfalfa aphid. Parentage of CW 4958 traces to the following germplasm sources: CW 3958, AItiva, Bahio 90, Grasis, and CW 446. Approximate germplasm source contributions are as follows: Ladak (1%), M.varia (2%), Turkistan (7%), Flemish (2%), Chilean (5%), Peruvian (2%), Indian (23%), African (55%), and Unknown (3%).

2. CW 4958 is adapted to the Southwestern U. S. and is intended for use in the Southwestern U. S. , Mexico, and Argentina. CW 4958 has been tested in California.

3. CW 4958 is a very nondormant variety with fall dormancy similar to CUF 101. Flower color observed in the SYN2 generation is approximately 95% purple and 5% variegated with a trace of white, cream, and yellow.

4. CW 4958 has high resistance to anthracnose (race 1), Fusarium wilt, spotted alfalfa aphid, blue alfalfa aphid, and pea aphid, resistance to Phytophthora root rot, and moderate resistance to Verticillium wilt Reaction to bacterial wilt, Aphanomyces root rot (race 1), stem nematode, and root knot nematode has not been adequately tested.

5. Seed increase of CW 4958 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 the consent of the breeder. Breeder seed was produced under cage isolation near Woodland, California in 1994. 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 4958 will be available in 1998.

7. No decision has been made regarding Plant Variety Protection.

8. This information can be forwarded to the PVP office.

9. Variety Name: _______________ Experimental Designation: CW 4958