1. C/W 2817 is a synthetic variety with 79 parent plants which were selected from populations that were developed by phenotypic recurrent selection and strain crossing. Parent plants were selected for multifoliolate expression and for resistance to one or more of the following pests: anthracnose, Verticillium wilt, Phytophthora root rot, spotted alfalfa aphid, blue alfalfa aphid, and Stagnospora root and crown rot. The following germplasm sources were used in the development of C/W 2817: Condor, Express, Arizona Multileaf (AZMFA), VS-446, Mede, Sundor, VS-626, Madera, Valley +, VS-448, Maricopa, UC129, Marana 76, Sequel, Pierce, Yolo, DK 122, and Crown II. Approximate germplasm source contributions are as follows: M.falcata (1%), Ladak (1%), M.varia (6%), Turkistan (13%), Flemish (10%), Chilean (8%), Peruvian (1%), Indian (26%), African (27%), and Unknown (7%).
2. C/W 2817 is adapted to the Sacramento Valley and San Joaquin Valley of California and is intended for use in the Sacramento and San Joaquin Valleys of California and similar production areas of Nevada, Arizona, and New Mexico. C/W 2817 has been tested in California.
3. C/W 2817 is a nondormant variety with fall dormancy similar to Moapa 69. Flower color observed in the Syn.1 generation is approximately 95% purple, 5% variegated, and a trace of white, cream, and yellow.
4. C/W 2817 has high resistance to Fusarium wilt and spotted alfalfa aphid with resistance to anthracnose (race 1) and Phytophthora root rot. It has moderate resistance to Verticillium wilt, pea aphid, and blue alfalfa aphid. Reaction to bacterial wilt, stem nematode, root knot nematode, and Aphanomyces root rot has not been adequately tested.
5. Seed increase 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 at Woodland, CA in 1990. 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 C/W 2817 will be available in 1993.
7. No decision has been made concerning Plant Variety Protection.
8. This information can be forwarded
to the PVP office.