1) Alfa 200 is a 177-plant synthetic variety resulting from phenotypic recurrent selection for resistance to anthracnose (Race 1). Source materjal traces to two experimental lines selected for resistance to blue alfalfa aphid, spotted alfalfa aphid, Fusarium wilt, and Phytophthora root rot. Parental germplasm traces to WL 508, WL 514, A77-1 OB, Cuf 101, Siriver, and UC 123. Approximate germplasm source contributions are: M. varia - 1%; Turkistan - 22%; Flemish - 1%; Chilean - 5%; lndian- 12%; and African - 59%.
2) Alfa 200 is adapted for use in central and southern California, southern Arizona, and central to northern Argentina. Alfa 200 has been tested in Arizona, California, and Argentina.
3) Flower color of Alfa 200 at Syn 2 approximates 100% purple with traces of variegated, cream, and white. The fall dormancy of Alfa 200 is similar to Cuf 101.
4) AIfa 200 has high resistance to Fusarium wilt, Phytophthora root rot, pea aphid, blue alfalfa aphid, and spotted alfalfa aphid; resistance to stem nematode; and low resistance to anthracnose (Race 1), bacterial wilt, and Verticillium wilt. Reaction to Aphanomyces root rot (Race 1) and root knot nematode have not been adequately tested.
5) Breeder seed (Syn 1) was produced in 1985 on 177 plants under cage isolation at Bakersfield, CA and will be maintained by W-L Research. Sufficient Foundation (Syn 2) seed will be produced near Cafayate, Argentina (Salta Province) for the expected life of the variety and will be maintained jointly by W-L Research and Cargill Argentina. 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. Production of Syn 3 Foundation seed requires consent of the breeder.
6) Certified seed will be marketed in 1994.
7) No decision has been made concerning Plant Variety Protection.
8) The information in this
application can be turned over to the PVP office.