CW 2761

1. C/W 2761 is a synthetic variety with 199 parent plants which were selected from populations that were developed by phenotypic recurrent selection and strain crossing. Parent plants were selected sequentially for multifoliolate leaf expression and for resistance to one or more of the following pests: anthracnose (race 1), Verticillium wilt, Phytophthora root rot, blue alfalfa aphid, spotted alfalfa aphid, and Stagnospora root and crown rot. The following germplasm sources were used in the development of C/W 2761: Condor, Express, Mede, VS--626, Arizona Multileaf (AZMFA), Sundor, Madera, Valley +, Yolo, and VS-448. Approximate germplasm source contributions are as follows: M. falcata (1%), Ladak (1%), M. varia (6%), Turkistan (15%), Flemish (12%), Chilean (10%), Peruvian (4%), Indian (22%), African (26%), and Unknown (3%).

2. C/W 2761 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.

3. C/W 2761 is a moderately dormant variety with fall dormancy similar to Lahonton. Flower color observed in the Syn.2 generation is approximately 98% purple, 2% variegated, and a trace of white, cream, and yellow. At first flower in autumn approximately 70% of the stems show multifoliolate leaf expression.

4. C/W 2761 has high resistance to anthracnose (race 1), bacterial wilt, Fusarium wilt, and Phytophthora root rot, with resistance to spotted alfalfa aphid. It has moderate resistance to Verticillium wilt. Reaction to stem nematode, root knot nematode, pea aphid, blue alfalfa aphid and Aphanomyces root rot (race 1) 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 consent of the breeder. Breeder seed was produced under cage isolation at Woodland, California 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 2671 will be available in 1994.

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

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