YIELDER
1. Yielder is a 16 clone synthetic cultivar. Parent clones trace to 10 populations selected for resistance to the following pests: bacterial wilt, Fusarium wilt, Verticillium wilt, Phytophthora root rot, anthracnose (race 1) and Aphanomyces root rot (race 1) plus two additional isolates. Phenotypic recurrent selection was used. Final selections were made form two-year old space plant selection nurseries near Napier, Iowa, based on yield, winter survival, degree of leafhopper yellowing and stunting, freedom from leaf diseases, fall dormancy reaction and multileaf expression.
Breeder seed (syn1) was produced in 1995 on approximately 25 cuttings of each clone transplanted at random and harvested in bulk. Parentage traces to Garst 645, Stine 9227, Dawn, Aggressor, Venture, Legend, Arrow, Clipper, Apollo Supreme, Nordic, AP 8932W and Envy (8% each) with 4% from numerous other sources.
Germplasm sources contributing to the genetic constitution of this variety are M. falcata (4%), Ladak (3%), M. varia (19%), Turkistan (12%), Flemish (46%), Chilean (8%), Peruvian (5%), and unknown (3%).
2. Yielder appears to be adapted to the north central and east central regions of the U.S. It is intended for use in the north central and east central regions of the U.S. It has been tested in Iowa, Wisconsin, and Illinois.
3. Fall dormancy of Yielder is similar to Ranger. Flower color is approximately 74% purple and 26% variegated with a trace of white, cream and yellow.
4. Yielder has high resistance to bacterial wilt, Verticillium wilt, Fusarium wilt and Phytophthora root rot and resistance to anthractnose (race 1), and pea aphid. It has not been, tested for reaction to blue alfalfa aphid, spotted alfalfa aphid, stem nematode, root knot nematode and Aphanomyces root rot.
5. Seed increase is limited to one generation each of breeder (syn1), foundation (syn2) and certified (syn3) seed classes. Certified seed may be produced from either breeder or foundation classes. A one, three and six year stand life is permitted on fields producing breeder, foundation and certified seed classes respectively. Foundation seed production is limited to the Pacific Northwest. Breeder seed was produced in 1995. ABI will maintain sufficient seed stocks, for the life of the variety.
6. Certified seed will be available in 1999.
7. Application will not be made for Plant Variety Protection.
8. This information can be forwarded to the PVP office.
9. Variety name: Yielder
Date submitted: November 1998
Experimental designations: ZM 9537