CW 64025
1. CW64025 is a synthetic variety with 250 parent plants which were selected sequentially formultifoliolate leaf expression and for resistance to Phytophthora root rot and Aphanomyces rootrot (race 1). Parent plants were selected from crosses between selections from 1995 breeder seedcages and from crosses between selections from three year old Wisconsin nurseries and electionsfrom 1995 breeder seed cages. Nursery selections were made from various populations whichwere developed by phenotypic recurrent selection for high relative feed value (using NearInfrared Reflectance Spectroscopy), and for resistance to one or more of the following pests:bacterial wilt, Verticillium wilt, Phytophthora root rot, Aphanomyces root rot (race 1),anthracnose (race 1), and Leptosphaendina leafspot. Parentage of CW 64025 traces to thefollowing germplasm sources: WinterGold, 9429, Alliant, BigHorn, Hunter, and miscellaneousCal/West Seeds breeding populations. Approximate germplasm source contributions are asfollows: M. falcata (8%), Ladak (6%), M. varia (27%), Turkistan (4%), Flemish (47%), andChilean (8%).
2. CW 64025 is adapted to the north central area of the U.S. and is intended for use in the northcentral, east central, and Great Plains areas of the U.S. CW 64025 has been tested in Wisconsinand Minnesota.
3. CW 64025 is a moderately dormant variety with fall dormancy similar to FD class 4 checkvarieties. Flower color observed in the syn2 generation is approximately 99% purple, 1%variegated, with a trace of white, cream, and yellow.
4. CW 64025 has high resistance to anthracnose (race 1), bacterial wilt, Fusarium wilt,Verticillium. wilt, Phytophthora root rot, Aphanomyces root rot (race 1), and pea aphid, withresistance to spotted alfalfa aphid and stem nematode. Reaction to blue alfalfa aphid and rootknot nematode has not been adequately tested.
5. Seed increase of CW 64025 is on a limited generation basis with one generation of breederand two generations of the foundation and certified seed classes. Breeder (syn1), foundation(syn2 or 3), and certified (syn3 or 4) classes will be recognized. Production of syn3 foundationseed requires consent of the breeder. Breeder seed was produced under cage isolation nearWoodland, California, in 1996. Sufficient foundation seed for the projected life of the varietywill be maintained by Cal/West Seeds. Stands of foundation and certified seed fields are limitedto 3 and 6 years, respectively.
6. Certified seed of CW 64025 will be available in 1999.
7. No decision has been made regarding Plant Variety Protection.
8. This information can be forwarded to the, PVP office.
9. Date submitted: November 30,1999
Experimental designation: CW 64025