SPRINT
1. Sprint is a synthetic variety with 180 parent plants which were selected sequentially for multifoliolate leaf expression and for resistance to Phytophthora root rot and Aphanomyces root rot (race 1). Parent plants were selected from crosses between selections from three year old Wisconsin clonal and selections from 1993 breeder seed cages. Nursery selections were made from various populations which were developed by phenotypic recurrent selection for high relative feed value (using Near Infrared Reflectance Spectroscopy), and for resistance to one or more of the following pests: bacterial wilt, Verticillium wilt, Phytophthora root rot, Aphanomyces, root rot (race 1), anthracnose (race 1), and Leptosphaerulina leafspot. Parentage of Sprint traces to the following germplasm sources Nemesis, MultiQueen, DK 142, GoldPlus, AlfaStar, GH 767, and miscellaneous Cal/West Seeds breeding populations. Approximate germplasm source contributions are as follows: M. falcata (8%), Ladak (6%), M.varia (26%), Turkistan (4%), Flemish (47%), and Chilean (9%).
2. Sprint is adapted to the north central, east central Great Plains and moderately winter hardy intermountain areas of the U.S. and is intended for use in the north central, cast central, Great plains and moderately winter hardy intermountain areas of the U.S. Sprint has been tested in Wisconsin, Minnesota, Iowa, Michigan, Pennsylvania, Nebraska, and Washington.
3. Sprint is a dormant variety with fall dormancy similar to Ranger. Flower color observed in the syn2 generation is approximately 98% purple, 2% variegated, with a trace of cream, white, and yellow.
4. Sprint has high resistance to anthracnose (race 1), bacterial wilt, Fusarium wilt, Phytophthora root rot, Aphanomyces root rot (race 1), spotted alfalfa aphid, blue alfalfa aphid, and pea aphid with resistance to Verticillium wilt and stem nematode. Reaction to root knot nematode has not been adequately tested.
5. Seed increase of Sprint is on a limited generation basis with one generation of breeder and two generations of the foundation and certified seed classes. Breeder (syn1), foundation (syn 2 or 3), and certified (syn3 or 4) classes will be recognized. Production of syn3 foundation seed requires consent of the breeder. Breeder seed was produced under cage isolation near Woodland, California, in 1994. Sufficient foundation seed for the projected life of the variety will be maintained by Cal/West Seeds. Stands of foundation and certified seed fields are limited to three and six years, respectively.
6. Certified seed of Sprint will be available in 1999.
7. No decision has been made regarding Plant Variety Protection.
8. This information can be forwarded to the PVP office.
9. Variety name: Sprint
Experimental designation: CW 4429
Date first accepted this variety: January 1999
Date this amendment submitted: November 30, 1999