1. 6400 HT was selected for tolerance to continuous grazing (two cycles of recurrent phenotypic selection) by cattle while maintaining a healthy, large crown and root system
2. 6400 HT appears to be adapted to the North Central and East Central Regions of the U.S.. It is intended for use in the North Central and East Central Regions of the U.S. as a grazing crop as well as for producing stored feed. It has been tested in Iowa, Wisconsin and Illinois.
3. The fall dormancy of 6400 HT is similar to the FD 4 check. Winter survival is similar to the WS 2 check. Flower color of syn 2 generation is approximately 67% purple and 33% variegated with a trace of white, cream and yellow. Tolerance to continuous grazing is superior to Alfagraze.
4. 6400 HT has high resistance to bacterial wilt, Verticillium wilt, Fusarium wilt, Phytophthora root rot, anthracnose (race 1), Aphanomyces root rot (race 1), pea aphid and low resistance to Aphanomyces root rot (race 2). It has not been tested for reaction to stem nematode, root knot nematode, spotted alfalfa aphid and blue alfalfa aphid.
5. Seed increase is limited to one generation each of breeder (syn 1), foundation (syn 2) and certified (syn 3) seed classes. Certified seed (syn 2 or 3) may be produced from either breeder or foundation classes. A 1,3 and 6 year stand life is permitted on fields producing breeder, foundation and certified seed classes respectively. Foundation seed production is limited to the Pacific Northwest. Breeder seed was produced in 1999. ABI will maintain sufficient seed stocks for the life of the variety.
6. Certified seed will be available in 2003.
7. Plant Variety Protection will not be applied for.
8. This information can be forwarded to the PVP office.
9. Variety Name: 6400 HT Date submitted November 21, 2002
Experimental designations: ZG 9941