CW 83019

1. CW 83019 is a synthetic variety with 225 parent plants that were selected sequentially for multifoliolate leaf expression and for resistance to Phytophthora root rot and Aphanomyces root rot (race I). Parent plants were selected from crosses between selections from three-year old Minnesota and Wisconsin yield trials and selections from three-year old Wisconsin nurseries. Yield trial source varieties and nursery source plants were selected from various populations that were developed by phenotypic recurrent selection for high relative feed value (using Near Infrared Reflectance Spectroscopy), and for resistance to one or more of the following pests: bacterial wilt, Fusarium Wilt, Verticillium wilt, Phytophthora root rot, Aphanomyces root rot (race 1), anthracnose (race 1). and Leptosphaerulina leafspot. Parentage of CW 83019 traces to the following germplasm sources: Abound, Sprint, Legend Gold, Pointer, 512, Gold Plus, DK 142, FQ 315, Nemesis, UltraLac and miscellaneous Cal/West Seeds breeding populations. Approximate germplasm source contributions are as follows: M. falcata (9%), Ladak (4%), M. varia (27%), Turkistan (4%), Flemish (47%). and Chilean (9%).

2. CW 83019 is adapted to the North Central and East Central areas of the U.S. and is intended for use in the North Central, East Central, and Great Plains areas of the U.S. CW 83019 bas been tested in Wisconsin, Illinois, Minnesota, Nebraska, Pennsylvania, and New York.

3. CW 83019 is a moderately dormant variety with fall dormancy similar to FD class 4 check varieties. Flower color observed in the Syn. 2 generation is greater than 99% purple with a trace of variegated, white, cream, and yellow.

4. CW 83019 has high resistance to anthracnose (race 1), Fusarium wilt, Phytophthora root rot, and Aphanomyces root rot (race 1), with resistance to bacterial wilt, pea aphid, and spotted alfalfa aphid. Reaction to Verticillium wilt, blue alfalfa aphid, stem nematode, and northern root knot nematode (Meloidogyne hapla) bas not been tested.

5. Seed increase of CW 83019 is on a limited generation basis with one generation of breeder and two generations of the foundation and certified seed classes. Breeder (Syn. l), 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 near Woodland, California in 1998. Sufficient foundation seed for the projected life of the variety will be maintained by Ca1/West Seeds. Stands foundation and certified seed fields are limited to 3 and 6 years, respectively.

6. Certified seed of CW 83019 will be available in 2003.

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

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

9. Variety Name: ______________________  Date submitted: November 30, 2003.

Experimental Designation:  CW 83019