W138
1. W138 is a 167-plant synthetic variety resulting from phenotypic recurrent selection for resistance to Verticillium wilt Source material traces to two elite experimental lines selected for resistance to Phytophthora root rot Parental germplasm traces to WI- 4571 WL 512, WI- 450 and WL 504. Approximate germplasm source contributions are: Ladak - 6% M varia - 7%; Turkistan - 11%; Flemish - 9%; Chilean -30%; Peruvian -29%; Indian -5% and African -3%.

2. W138 is adapted to and intended for use in the Southwestern United States. W138 has been yield tested in California.

3. Flower color of W138 at Syn 2 approximates 100% purple with traces of cream, variegated and white. The fall dormancy of WI 38 is similar to Sutter (Class 7).

4. W138 has high resistance to anthracnose (race 1), Fusarium wilt, Verticillium wilt, Phytophthora root rot, stem nematode, blue alfalfa aphid, pea aphid and spotted alfalfa aphid; and resistance to bacterial wilt and southern root-knot nematode. Reaction to Aphanomyces root rot (Race 1) has not been adequately tested.

5. Breeder seed (Syn 1) was produced in 1994 on 167 plants under cage isolation at Warden, WA. Sufficient foundation seed for the expected life of the variety will be maintained by W-L Research. 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 1998.

7. It is undecided whether application will be made for Plant Variety Protection.

8. The information in this application can be turned over to the PVP office.

9.Experimental Designation: W138 Date submitted:November 1997