1. Summit is a synthetic variety with 384 parent plants. Parents trace to various populations selected for resistance to the following pests: bacterial wilt, Verticillium wilt, anthracnose, Phytophthora root rot and spotted alfalfa aphid. The following germplasm sources, in order of contribution, were used in the development of this variety: Emerald, WL-316, Apollo II, DK-135, Advantage, Excalibur, Oneida, Jubilee and Trident.
2. Summit is a moderately winter-hardy variety adapted to for use in the northcentral and northeastern U.S. for hay, haylage and greenchop. The variety has been tested in Iowa, Michigan, Minnesota, New York, Pennsylvania and Wisconsin.
3. Fall dormancy is similar to Saranac. Flower color is approximately 70% purple, 30% variegated and<l% yellow and white.
4. Summit has high resistance to anthracnose and resistance to bacterial wilt, Verticillium wilt, Phytophthora root rot, Fusarium wilt and pea aphid. Summit is moderately resistant to spotted alfalfa aphid. Reaction to stem nematode is unknown.
5. Seed increase is on a limited generation basis with one generation each of breeder and certified seed classes, and two generations of foundation seed. Breeder (Syn. 1) foundation (Syn. 2 or Syn. 3) and certified (Syn. 3 or Syn. 4) classes will be recognized. Production of Syn. 3 foundation seed requires authorization by the breeder. Stand limitations are 1, 2 and 6 years for breeder, foundation and certified seed fields respectively.
6. Certified seed will be marketed in 1986.
7. No decision has been made concerning Plant Variety Protection.