1. CW 9501 is an advanced generation synthetic variety of Ladino type white clover with 33 parent plants. Parent plants were selected from a group of 103 clones based on forage yield in a replicated half-sib progeny test. The 103 clones evaluated in the half-sib progeny test were selected for vegetative vigor following frequent cutting, flowering intensity, and freedom from leaf disease and virus in a population of approximately 3000 seedlings that were established as spaced plants on a 3-foot x 3foot grid spacing in a selection nursery at Woodland, California. Parentage of CW 9501 traces to the following varieties: CW 190 (50%), Regal (10%), SRVR (10%), and miscellaneous Cal/West Seeds breeding populations (30%). Breeder seed (Syn.1) was produced under field isolation near Woodland, California in 1995. Ten vegetative cuttings from each of the 33 parent plants were established to produce the breeder seed. Seed was bulk harvested from all parent plants.
2. CW 9501 is adapted to the Moderately Winterhardy Intermountain area of the U.S., Japan, and South Africa and is intended for use in the southeastern and central U.S., Europe, Japan, South Africa and Argentina. CW 9501 has been tested in California, Japan, and South Africa. The intended use of CW 9501 is for hay, haylage, greenchop, or pasture, primarily in mixtures with forage grasses.
3. CW 9501 is earlier in maturity and has a higher frequency of plants without leaf markings compared to CW 190.
4. Seed increase of CW 9501 is on a limited generation basis with one generation of breeder and two generations of the foundation and certified seed classes. Breeder (Syn.1), foundation (Syn.2 or Syn.3), and certified (Syn.3 or Syn.4) classes will be recognized. Production of Syn.3 foundation seed requires consent of the breeder. Breeder seed was produced under field isolation near Woodland, California in 1995. 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 2 and 4 years, respectively.
5. Certified seed of CW 9501 will be available in 2003.
6. No decision has been made regarding Plant Variety Protection.
7. This information can be forwarded to the PVP office.
8. Variety Name: Date Submitted: November 30, 2002
Experimental Designation: CW 9501