1. 55V05 is a synthetic cultivar with 196 parent plants intercrossed in cage isolation. Parent plants trace to a Pioneer experimental with winterhardiness, forage yield, persistence, and resistance to the blue alfalfa aphid (biotype 2 BA0K90). Parent plants of 55V05 were selected phenotypically for one or more of the following pests: bacterial wilt, Verticillium wilt, Phytophthora root rot, stem nematode, northern root knot nematode, Aphanomyces root rot, and blue alfalfa aphid (biotype 2 BA0K90).

2. 55V05 is adapted to thc North Central and moderately winterhardy intermountain regions of the United States. It is intended for use in the Great Plains, East Central, winterhardy intermountain, moderately winterhardy intermountain regions of the United States, as well as in Canada.

3. 55V05 is moderately dormant cultivar with a fall dormancy similar to PD-5 check. Flower color of the Syn 2 generation is approximately 72% purple, 25% variegated, 3% yellow and a trace of cream and white.

4. 55V05 is highly resistant to anthracnose (race 1), stem nematode, northern root knot nematode, Phytophthora root rot, Verticillium wilt, and pea aphid; resistant to bacterial wilt, spotted aphid, Aphanomyces root rot and Fusarium wilt. 55V05 has not been tested for resistance to blue alfalfa aphid.

5. Breeder seed (Syn 1) was produced on 196 plants in Connell, WA, and bulked. Seed classes will be breeder, foundation (Syn 2 or 3), and certified (Syn 2, 3 or 4). Foundation seed may be produced from breeder or foundation. The second-generation foundation seed may be produced at the discretion of Pioneer Hi-Bred International, Inc. Limitations of age of stand will be three and five years, respectively, for foundation and certified seed. Breeder seed must be grown in the Pacific Northwest region of the United States.

6. Seed will be marketed in the spring of 2003.

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 P.V.P. office.

9 Variety name: 55V05 Date submitted: November 29, 2001

Experimental designation: X55V05, Y55V05, 96N0SPL1


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