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57Q75 |
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1. 57Q75 is a 149 plant synthetic variety that traces to a Pioneer experimental line selected for improved feeding value using phenotypic recurrent selection techniques. Each of the 149 plants were selected for resistance to stem nematodes, Phytophthora root rot, and spotted alfalfa aphids and intercrossed in cage. The parental source originated from a diverse background in which multiple sources were screened for improved feeding quality and selected for high relative feed value (RFV). 2. 57Q75 is adapted to Argentina, Australia and Italy. 57Q75 is intended for use in the Southwest, Moderately Winterhardy Intermountain and Great Plains area of the U.S., as well as Argentina, Australia and Italy. 3. 57Q75 is a nondormant cultivar with fall dormancy similar to FD-7 check. Flower color of the Syn 2 generation is 97% purple, 3.0% variegated with traces of cream, yellow, and white. 4. 57Q75 has high resistance to anthracnose (race 1), Phytophthora root rot, and Fusarium wilt; resistance to pea aphid, stem nematode, northern root knot nematode, southern root knot nematode, Verticillium wilt, and spotted alfalfa aphid; moderate resistance to Aphanomyces root rot, blue aphid, and bacterial wilt. 5. Breeder's seed (Syn 1) was produced in 1997 on parent plants in "cage isolation" and bulked. Seed classes will be breeder, foundation (Syn 2 or Syn 3) and certified (Syn 2, Syn 3, or Syn 4). Foundation seed may be produced from breeder or foundation. The second-generation foundation (Syn 3) may be produced at the discretion of Pioneer Hi-Bred International, Inc. Limitations on age of stand will be one year, three years and five years, respectively, for breeder seed, foundation seed and certified seed. Breeder seed must be produced in Washington. Sufficient breeder and/or foundation seed for the projected life of the variety will be maintained by Pioneer Hi-Bred International, Inc. 6. Certified seed may be marketed in the fall of 2003 in the U.S. 7. Application for Plant Variety Protection may be made, and the certification option will not be requested. 8. As a means of added varietal protection, information included with the application for Review of Alfalfa Varieties for Certification may be provided to the PVP office. 9. Variety name: 57Q75 Date submitted: December 2002 10. Experimental designations: X57Q75, Y57Q75, 97I04PS1 |