1. PGI 84D92 is a 424 clone synthetic developed through phenotypic recurrent selection for reaction to blue alfalfa aphid, anthracnose and Phytophthora root rot. It was selected from four PGI varieties; Arroyo (33%), Maricopa (27%), Yolo (23%) and Armona (17%). The 424 plants were placed in a cage near Woodland, CA where breeder seed (Syn 1)was produced in 1984. Approximate germplasm source contributions are: Turkistan 26%, Indian 14%, Chilean 10%, African 9%, M.varia 4%, Ladak 1% and Unknown 36%.
2. PGI 84D92 is adapted and intended for use in the southwestern United States for hay, haylage, greenchop or dehydrated alfalfa production. It has been evaluated for forage yield and persistence in California.
3. PGI 84D92 is a non--dormant cultivar with a dormancy similar to Moapa 69. Flower color is 100% purple with a trace of cream and variegated.
4. PGI 84D92 has high resistance to Fusarium wilt and Northern root-knot nematode (M. hapla); resistance to Phytophthora root rot, blue alfalfa aphid, pea aphid and stem nematode and moderate resistance to bacterial wilt. It has not been adequately tested to determine its reaction to anthracnose, Verticillium wilt or spotted alfalfa aphid.
5. Sufficient breeder seed (Syn 1) was produced to last the life of the variety. Seed classes will be breeder (Syn 1) , foundation (Syn2 or 3), and certified (Syn 2, 3 or 4). Foundation seed may be produced from breeder seed and a second generation of foundation seed (Syn 3) may be produced at the breeder's discretion. Certified seed may be produced from either breeder (Syn 1)or foundation seed (Syn 2 or 3). Stand duration will be 1, 4 and 6 years for breeder, foundation and certified seed fields respectively.
6. Certified seed will be available in 1992.
7. It has not yet been decided whether or not to apply for Plant Variety Protection.
8. This information may be
forwarded to the PVP office.