CW 64008
1. CW64008 is a synthetic variety with 225 parent plants which were selectedsequentially formultifoliolate leaf expression and for resistance to Phytophthoraroot rot and Aphanomyces rootrot (race 1). Parent plants were selected fromcrosses between selections from three year oldWisconsin, Minnesota, and Iowayield tests and selections from three year old Wisconsinnurseries. Nurseryselections were made from various populations which were developed byphenotypicrecurrent selection for high relative feed value (using Near Infrared ReflectanceSpectroscopy), and for resistance to one or more of the following pests:bacterial wilt,verticillium wilt, Phytophthora root rot, Aphanomyces rootrot (race 1), anthracnose (race 1),and Leptosphaerulina leafspot. Parentageof CW 64008 traces to the following germplasm.sources: WinterKing, Maximum1, 9326, BigHorn, Hunter, and miscellaneous Cal/West Seedsbreeding populations.Approximate germplasm source contributions are as Follows: M. falcata(8%),Ladak (5%), M. varia (26%), Turkistan (4%), Flemish (48%), and Chilean (9%).
2. CW 64008 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 theU.S. CW 64008 has been tested in Wisconsin,Minnesota, and Iowa.
3. CW 64008 is a moderately dormant variety with fall dormancy similar to Fl) 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 64008 has high resistance to anthracnose (race 1), bacterial wilt, Fusarium wilt,Verticillium wilt, Phytophthora root rot, and Aphanomyces root rot (race 1), with resistance tospotted alfalfa aphid, pea aphid, and stem nematode. Reaction to blue alfalfa aphid and root knotnematode has not been adequately tested.
5. Seed increase of CW 64008 is on a limited generation basis with one generation of breederand two generations of the foundation and certifiedseed classes. Breeder (syn1), foundation(syn2 or 3), and certified (syn3or 4) classes will be recognized. Production of syn3 foundationseed requiresconsent of the breeder Breeder seed was produced under cageisolation nearWoodland, California, in 1996. Sufficient foundation seed forthe projected life of the varietywill be maintained by Cal/West Seeds. Standsof foundation and certified seed fields are limitedto three and six years,respectively.
6. Certified seed of CW 64008 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 64008