1. Radiant AM is a synthetic variety with 200 parent plants that were selected sequentially for
multifoliolate leaf expression and for resistance to Phytophthora root rot, Aphanomyces root rot, and
anthracnose. Parent plants were selected from crosses between selections from three-year old Wisconsin
nursery selection from various populations. Nursery source plants were derived 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, anthracnose (race 1),
Leptosphaerulina leafspot, and stem nematode. Parentage of Radiant AM traces to the following
germplasm sources: 512 (11), 9326 (3%), DK 142 (6%), Stallion (3%), WinterKing (3%), and
miscellaneous Cal/West Seeds breeding populations (74%). Breeder seed (Syn.1) was produced under
cage isolation near Woodland, California in 2000.
2. Radiant AM is adapted to the North Central, East Central, and Great Plains areas of the U.S. and is
intended for use in the North Central, East Central, Great Plains, Moderately Winterhardy Intermountain,
and Winterhardy Intermountain areas of the U.S.. Radiant AM has been tested in Wisconsin, Iowa,
Minnesota, Pennsylvania, Ohio, Nebraska, and Indiana.
3. Radiant AM is a moderately dormant variety with fall dormancy similar to FD class 4 check varieties.
Flower color observed in the Syn.2 generation is approximately 100% purple with a trace of variegated,
white, cream, and yellow.
4. Radiant AM has high resistance to anthracnose (race 1), bacterial wilt, Fusarium wilt, Verticillium
wilt, Phytophthora root rot, Aphanomyces root rot (race 1), and stem nematode, resistance to pea aphid,
and moderate resistance to root knot nematode (Meloidogyne hapla). Reaction to the spotted alfalfa aphid
and blue alfalfa aphid has not been tested.
5. Seed increase of Radiant AM is on a limited generation basis with two generations each of breeder,
foundation, and certified seed classes. Breeder (Syn.1 or Syn.2), foundation (Syn.2 or Syn.3), and
certified (Syn.3 or Syn.4) classes will be recognized. Production of Syn.2 breeder or Syn.3 foundation
seed requires consent of the breeder. Breeder seed was produced under cage isolation near Woodland,
California in 2000. 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 Radiant AM will be available in 2006.
7. No decision has been made regarding Plant Variety Protection.
8. This information can be forwarded to the PVP office.
9. Variety Name: Radiant AM Date submitted: November 30, 2005.
Experimental Designation: CW 04023