1. GH755 is a synthetic variety composed of 157 plants selected for resistance to Aphanomyces root rot. Source material traces to two elite experimental lines selected for agronomic appearance and resistance to Phytophthora root rot and Verticillium wilt. Subsequent selection was performed for resistance to Aphanomyces root rot. Parental germplasm traces to Arrow, Trident, Vertus, WL 318, Vernal, and Ranger. Approximate germplasm source contributions are: M. falcata - 11%; Ladak - 16%; M. varia - 24%; Turkistan - 4%; Flemish - 40%; and Chilean - 5%.
2. GH755 is adapted to and intended for use in the northwest, north central, and northeastern United States for hay, haylage, and dehydration purposes. GH755 has been yield tested in Wisconsin, Iowa, Illinois, and Washington.
3. GH755 is a moderately fall-dormant variety with flower color that approximates 98% purple and 2% variegated with traces of cream and yellow. Its fall dormancy is similar to that of Saranac.
4. GH755 has high resistance to anthracnose (Race 1), bacterial wilt, Fusarium wilt, and Phytophthora root rot; and resistance to Verticillium wilt, Aphanomyces root rot (Race 1), pea aphid, blue alfalfa aphid, spotted alfalfa aphid, and stem nematode.
5. Breeder seed (Syn 1) was produced on 157 plants under cage-isolation at Bakersfield, CA. Sufficient Foundation (Syn 2) seed was produced near Warden, Washington for the expected life of the variety. One generation of Breeder (Syn 1) and two generations each of Foundation (Syn 2 or 3) and Certified (Syn 3 or 4) seed are recognized. The maximum permitted length of stand for Foundation and Certified seed fields are 3 and 5 years, respectively. Foundation seed must be produced above 40 degrees North latitude. Production of Syn 3 Foundation seed requires consent of the breeder.
6. Certified seed will be marketed in 1992.
7. It is undecided whether application will be made for Plant Variety Protection.
8. The information in the
application is available to the PVP office.