ABT 400 SCL
1. ABT 400 SCL is a 150-plant synthetic variety resulting from phenotypic recurrent selectionfor resistance to Sclerotinia crown and stem rot Parental germplasm traces to Chief, GH75 5,Promise and WL 323. Approximate germplasm source contributions are M. faicata (7%), Ladak(19%), M. varia (22%), Turkistan (10%), Flemish (340/o), and Chilean (8%).
2. ABT 400 SCL is adapted for use in the north central, east central and moderately winter hardyintermountain regions of the United States. ABT 400 SCL has been yield tested in Pennsylvania,Washington, and Wisconsin.
3. Flower color of ABT 400 SCL at syn2 approximates 100% purple with traces of cream andKvariegated. The fall dormancy of ABT 400 SCL is similar to Legend (Class 4).
4. ABT 400 SCL has high resistance to anthracnose (race 1), bacterial wilt, Fusarium wilt,Verticillium wilt, Phytophthora root rot, Aphanomyces root rot (race 1) and pea aphid; resistanceto spotted alfalfa aphid; and moderate resistance to stem nematode and northern root knotnematode. Reaction to blue alfalfa aphid has not been adequately tested.
5. Breeder seed (syn1) was produced in 1995 on 150 plants under cage isolation at Bakersfield,California. Sufficient foundation (syn2) seed will be produced for the expected life of the varietyand will be maintained by W-L Research. One generation of breeder (syn1) and two generationseach of foundation (syn2 or 3) and certified (syn3 or 4) seed are recognized. The maximumpermitted length of stand for foundation and certified seed fields are three and five years,respectively. Foundation seed must be produced above 40 degrees North latitude. Production ofsyn3 foundation seed requires consent of the breeder.
6. Certified seed will be marketed in 1999.
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. Variety name: ABT 400 SCL
Experimental designation: C231
Date first accepted: January 1999
Date this amendment submitted: November 1999