1. 54V46 is a synthetic cultivar with 186 parent plants, which were screened phenotypically for resistance to Aphanomycyes (races 1 and 2) and Phytophthora root rot. 54V46 was selected from a synthetic cultivar tracing to 12 half-sib families. The families were selected for forage yield, and field appearance and the parents were selected phenotypically for resistance to one or more of the following pests: anthracnose race 1, Phytophthora root rot, Aphanomycyes root rot (races 1 and 2), bacterial wilt, Fusarium wilt, Verticillium wilt, and spotted alfalfa aphid.
2. 54V46 is adapted to the North Central, East Central and moderately winterhardy intermountain regions of the United States and Ontario, Canada. 54V46 is intended for use in the North Central, East Central, winterhardy intermountain, moderately winterhardy intermountain, and Great Plains regions of the United States, as well as Canada.
3. 54V46 is a moderately dormant cultivar with fall dormancy similar to FD-4 check. Flower color of the Syn 2 generation is approximately 85% purple, 14% variegated, 1% cream with a trace of yellow and white.
4. 54V46 is highly resistant to anthracnose (race 1), Phytophthora root rot, Aphanomyces root rot (race 1), Fusarium wilt, Verticillium wilt, and Northern Root Knot Nematode; resistant to spotted alfalfa aphid, Aphanomyces root rot (race 2) and Bacterial wilt; and moderately resistant to stem nematode, pea aphid, and has a low resistance to blue alfalfa aphid.
5. Breeder seed (Syn 1) was produced on 186 plants under cage isolation during the summer of 1999 in Connell, WA, and bulked. Seed classes will be breeder, foundation (Syn 2 or 3), and certified (Syn 2, 3, or 4). Foundation seed may be produced from breeder or foundation. The second-generation foundation seed may be produced at the discretion of Pioneer Hi-Bred International, Inc. Limitations of age of stand will be three and five years, respectively, for foundation and certified seed. Breeder seed must be grown in the Pacific Northwest region of the United States.
6. Seed will be marketed in the spring of 2003.
7. Application for Plant Variety Protection may be made and the certification option will not be requested.
8. As a means of added varietal protection, information included with the Application for Review of Alfalfa Varieties for Certification may be provided to the PVP office.
9. Variety name: 54V46 Date submitted: November 29, 2002
Experimental designation: X54V46, X54H46, Y54H46, 99W23PM1