DS 309
1. DS 309 is a synthetic variety developed by Dairyland Research International, Clinton, WI. Parental clones traced to Magnum (18), Conquer (7), Blazer (12), 120 (7), and Americana 7~N 7525 (4). Parental clones were selected based on progeny tests for one or more of the following traits: resistance to bacterial wilt, anthracnose, Phytophthora root rot.
2. DS 309 has been tested in Wisconsin, Iowa, Kansas, Michigan, Illinois, and Ohio, It will be marketed in Midwestern states. The primary purpose will be for hay, greenchop, and dehydration.
3. Fall dormancy is similar to Saranac. Flower color is approximately 65% purple and 35% variegated.
4. DS 309 has high resistance to bacterial wilt, moderate resistance to anthracnose, Phytophthora root rot, Verticillium wilt and spotted alfalfa aphid. Reaction to Fusarium wilt, pea aphid and stem nematode is unknown.
5. Parental clones were planted under cage isolation and intercrossed at Sloughhouse, California to produce breeder seed. Breeder seed (Syn 1) will be produced in a cage from cuttings of the parental clones. Foundation seed will be produced from Breeder seed and certified seed either from Breeder or Foundation seed. One generation each of Breeder, Foundation, and Certified seed class is recognized. A maximum of three years each is permitted on stands producing Breeder and Foundation seed with five years for Certified seed.
6. Certified seed will be produced in 1987.
7. Application will be made for Plant Variety Protection. No certification option.