1. Prairie Max is a synthetic variety with 207 parent plants that were selected sequentially for multifoliolate leaf expression and for resistance to Phytophthora root rot and Aphanomyces root rot (race 1). Parent plants were selected from crosses between selections from three-year old Minnesota, Iowa, and Wisconsin yield trials. Yield trial source varieties 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 (race 1), anthracnose (race 1), and Leptosphaerulina leafspot. Parentage of Prairie Max traces to the following germplasm sources: TMF 421, GH 767 and miscellaneous Cal/West Seeds breeding populations. Approximate germplasm source contributions are as follows: M.falcata (8%), Ladak (6%), M.varia (25%), Turkistan (4%), Flemish (48%), and Chilean (9%).
2. Prairie Max is adapted to and intended for use in the North Central, East Central, and Great Plains areas of the U.S. Prairie Max has been tested in Wisconsin, Minnesota, Pennsylvania, and Nebraska.
3. Prairie Max is a dormant variety with fall dormancy similar to FD class 3 check varieties. Flower color observed in the Syn.2 generation is approximately 100% purple, with a trace of variegated, white, cream, and yellow.
4. Prairie Max has high resistance to anthracnose (race 1), bacterial wilt, Fusarium wilt, Phytophthora root rot, Aphanomyces root rot (race 1), and spotted alfalfa aphid, with resistance to Verticillium wilt, pea aphid, stem nematode, and northern root knot nematode (Meloidogyne hapla). Reaction to blue alfalfa aphid has not been adequately tested.
5. Seed increase of Prairie Max is on a limited generation basis with one generation of breeder and two generations of the foundation and certified seed classes. Breeder (Syn. D, 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 1996. 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 Prairie Max will be available in 2003.
7. No decision has been made regarding Plant Variety Protection.
8. This information can be forwarded to the PVP office.
9. Variety Name: Prairie Max Date submitted: November30 2002.
Experimental Designation: CW 63004.