1. C/W 2773 is a synthetic variety
with 282 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, Phytophthora root rot, Verticillium
wilt, spotted alfalfa aphid, and blue alfalfa aphid. The following germplasm
sources were used in the development of C/W 2773: Mede, Condor, VS-448,
Maricopa, Madera, Sundor, and miscellaneous VISTA breeding lines. Approximate
germplasm source contributions are as
follows: M. falcata (1%),
Ladak (1%), M. varia (5%), Turkistan (11%), Flemish (10%), Chilean
(7%), Peruvian (2%), Indian (13%), African (21%), and Unknown (29%).
2. C/W 2773 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 2773 has been
tested in
California.
3. C/W 2773 is a non-dormant variety with fall dormancy similar to Mesilla. Flower color observed in the Syn.1 generation is approximately 99% purple, 1% variegated, and a trace of white, cream, and yellow.
4. C/W 2773 has high resistance to anthracnose (race 1), Fusarium wilt, and spotted alfalfa aphid, with resistance to blue alfalfa aphid. It has moderate resistance to Verticillium wilt, Phytophthora root rot, and pea 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 1989. 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 2773 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.