Robust T&N
(November 21,2002)

1. Robust T&N is a synthetic variety with 200 parental clones. Parent clones trace to one population selected for resistance to phytophthora root rot, anthracnose, bacterial wilt, fusarium wilt, verticillium wilt, blue alfalfa aphid, spotted alfalfa aphid, pea aphid, stem nematode, and northern root knot nematode, and grazing tolerance.

Recurrent phenotypic selection was used. Final selections were made from two and three year old nurseries near Nampa, Idaho based on overall root and crown health.

Parentage traces to experimental closely related to the variety Archer (100%). Breeder seed (Syn 1) was produced on cuttings of the parental clones near Nampa, Idaho, in 1997. Breeder seed was produced under field isolation.

2. Robust T&N appears to be adapted to and is intended for use in the moderately winterhardy and winterhardy Intermountain region of the U.S. It has been tested in Idaho, Washington and California

3. Fall dormancy of Robust T&N is similar to the FD 4 check. Flower color in the Syn 2 is approximately 89% purple, 11% variegated, and a trace of cream, yellow, and white.

4. Robust T&N has high resistance to anthracnose (race 1), fusarium wilt, verticillium wilt, phytophthora root rot, stem nematode, pea aphid, resistance to bacterial wilt, spotted alfalfa aphid, northern root knot nematode, moderate resistance to blue alfalfa aphid and aphanomyces root rot (Race 1).

5. Seed increase is limited to one generation of breeder seed (Syn 1), two generations of foundation (Syn 2) and two to three generations (Syn 2 or 3) of certified seed. Certified seed may be produced from either breeder or foundation classes. A 1, 3, and 6 year stand life is permitted on fields producing breeder, foundation and certified classes, respectively. Foundation seed production is limited to the Pacific Northwest. Breeder seed was produced in 1997. ABI will maintain sufficient stocks for the projected life of the variety.

6. Certified seed will be available in 2003

7. Plant Variety protection will not be applied for.

8. This information can be forwarded to the PVP office.

9 Variety Name: Robust T&N Date submitted: November 21, 2002

Experimental designations: ZG 9850

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