A4230

1. A4230 is a synthetic variety with 217 parent plants which were selected sequentially for multifoliolate leaf expression and for resistance to Phytophthora root rot and Aphanomyces root rot (rare 1). Parent plants were selected from crosses between elite selections from three year old Wisconsin selection nurseries that were derived 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 A4230 traces to the following germplasm sources: BigHorn, Hunter, Maximum 1, WinterKing, and miscellaneous Cal/West Seeds breeding populations. Approximate germplasm source pontributions are as follows: Mfialcata (80/6), Ladak (5%), M.varia (260/6), Turkistan (4%), Flemish (48%), and Chilean (9%).

2. A4230 is adapted to the north central, east central, and Great Plains areas of the U.S. and is intended for use in the north central, east central, and Great Plains areas of the U.S. A4230 has been tested in Wisconsin, Minnesota, Iowa, Michigan, Pennsylvania, and Nebraska.

3. A4230 is a moderately dormant variety with fall dormancy similar to FD class 4 check varieties. Flower color observed in the syn2 generation is approximately 99% purple, 1% variegated, with a trace of white, cream, and yellow.

4. A423 0 has high resistance to anthracnose (race 1), bacterial wilt, Fusarium wilt, Verticillium wilt, Phytophthora root rot, and Aphanomyces root rot (race 1), with resistance to spotted alfalfa aphid, pea aphid, and stem nematode. Reaction to blue alfalfa aphid and root knot nematode has not been adequately tested.

5. Seed increase of A4230 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 1996. 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 A4230 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: A4230

Date submitted: November 30, 1999

Experimental designation: CW 64015