ABT 400 SCL

 

 

  1. ABT 400 SCL is a 150-plant synthetic variety resulting from phenotypic recurrent selection for resistance to Sclerotinia crown and stem rot. Parental germplasm traces to Chief, GH755, Promise and WL 323. Approximate germplasm source contributions are M. facata – 7%; Ladak – 19%; M. varia – 22%; Turkistan – 10%; Flemish – 34%; and Chilean – 8%.

  1. ABT 400 SCL is adapted for use in the North Central, East Central and moderately winterhardy intermountain regions of the United States. ABT 400 SCL has been yield tested in Pennsylvania, Washington and Wisconsin.

  1. Flower color of ABT 400 SCL at Syn 2 approximates 100% purple with traces of cream and variegated. The fall dormancy of ABT 400 SCL is similar to Legend (Class 4).

  1. 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; resistance to spotted alfalfa aphid; and moderate resistance to stem nematode and northern root knot nematode. Reaction to blue alfalfa aphid and Fusarium wilt has not been adequately tested.

  1. Breeder seed (Syn 1) was produced in 1995 on 150 plants under cage isolation at Bakersfield, California. Sufficient foundation (Syn 2) seed will be produced for the expected life of the variety and 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 three and five years, respectively. Foundation seed must be produced above 40 degrees North latitude. Production of Syn 3 Foundation seed requires consent of the breeder.

  1. Certified seed will be marketed in 1999.

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

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

  1. Variety Name: ABT 400 SCL Experimental Designation: C231

Date submitted: November, 1998

 

 

 

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