1. GT 13 R Plus originated from a 5-year-old hay field planted to AS 13 R near Patterson, California. A portion of the field which had been decimated by Phytophthora root rot and other factors, was allowed to set seed in 1980. This original seed was planted in Kern County, California to produce breeder (Syn 2) seed of the variety. Germplasm sources are Turkistan (30%) and African (70%).
2. GT 13 R Plus is intended for use as hay, haylage, greenchop or dehy in the San Joaquin, Sacramento and coastal valleys of Central and Southern California, high desert valleys of Southern California, Arizona, Nevada, New Mexico and West Texas. It has been tested in California and New Mexico.
3. GT 13 R Plus is a nondormant variety with fall dormancy similar to Moapa 69. Flower color is 100% purple.
4. GT 13 R Plus has high resistance to Fusarium wilt; resistance to Phytophthora root rot, bacterial wilt, downy mildew, spotted alfalfa aphid and stem nematode; moderate resistance to Southern root knot nematode; and low resistance to blue alfalfa aphid. It is susceptible to anthracnose. It has not been adequately tested for resistance to Verticillium wilt or pea aphid.
5. Breeder (Syn 2) seed was produced in Kern County, California with a sufficient quantity for the expected life of the variety held in controlled storage. Seed increase is limited to one generation each of breeder, foundation and certified classes. A 3 and 6-year stand life is permitted on fields producing foundation and certified seed, respectively. All seed production is limited to the southern region of adaptation.
6. Certified seed will be available in 1987.
7. Application for Plant Variety Protection has been made and the certification option was not requested.
8. This information may be forwarded
to the PVP office.