1. Labrador is a synthetic variety with 209 parent plants that were selected sequentially for high winter
hardiness, high forage yield, high relative feed value, and multifoliolate leaf expression. Parent plants were
selected from selections from three-year old Minnesota yield trials, three-year old Wisconsin yield trials, and
from three-year old Wisconsin nursery selections from various populations. Yield trial source varieties and
nursery source plants were derived from various populations that were developed by phenotypic recurrent
selection for high relative feed value (using Near Infrared Reflectance Spectroscopy), and for resistance to
one or more of the following pests: bacterial wilt, Fusarium Wilt, Verticillium wilt, Phytophthora root rot,
Aphanomyces root rot, anthracnose (race 1), and Leptosphaerulina leafspot. Parentage of Labrador traces to
the following germplasm sources: 9429, Alliant, WinterGold, FQ 315, Big Horn, DK 133, DK 142, 329, 512,
9326, Abound, Power 4.2, Stallion, TMF 421, Trialfalon, Tribute, WinterKing, and miscellaneous Cal/West
Seeds breeding populations. Breeder seed (Syn.1) was produced under cage isolation near Woodland,
California in 1999.
2. Labrador is adapted to the North Central, East Central, and Great Plains areas of the U.S. and is intended
for use in the North Central, East Central, Great Plains, Moderately Winterhardy Intermountain, and
Winterhardy Intermountain areas of the U.S.. Labrador has been tested in Wisconsin, Iowa, Minnesota,
Pennsylvania, Ohio, and Nebraska.
3. Labrador is a moderately dormant variety with fall dormancy similar to FD class 4 check varieties.
Flower color observed in the Syn.2 generation is approximately 100% purple with a trace of variegated,
white, cream, and yellow.
4. Labrador has high resistance to anthracnose (race 1), bacterial wilt, Fusarium wilt, Verticillium wilt,
Phytophthora root rot, Aphanomyces root rot (race 1), and stem nematode, with resistance to pea aphid, and
moderate resistance to root knot nematode (Meloidogyne hapla). Reaction to the spotted alfalfa aphid and
blue alfalfa aphid has not been tested.
5. Seed increase of Labrador is on a limited generation basis with two generations each of breeder,
foundation, and certified seed classes. Breeder (Syn.1 or Syn.2), foundation (Syn.2 or Syn.3), and certified
(Syn.3 or Syn.4) classes will be recognized. Production of Syn.2 breeder or Syn.3 foundation seed requires
consent of the breeder. Breeder seed was produced under cage isolation near Woodland, California in 1999.
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 3 and 6 years, respectively.
6. Certified seed of Labrador will be available in 2006.
7. No decision has been made regarding Plant Variety Protection.
8. This information can be forwarded to the PVP office.
9. Variety Name: Labrador Date submitted: November 30, 2005.
Experimental Designation: CW 94006