1. Quantum is a synthetic variety
with 62 parent clones. Parent clones trace to 19 populations selected for
resistance to the following pests: bacterial wilt, Fusarium wilt, Verticillium
wilt, Phytophthora root rot, anthracnose and Aphanomyces. Phenotypic recurrent
selection was used. Final selections were made from 2-year-old space-plant
selection nurseries at Marshfield
and Livingston, Wisconsin, based on vigor, leafhopper yellowing resistance,
leaf disease resistance, winter injury and fall dormancy reaction. Parentage
traces to Trident II (15%), Venture (14%), Dominator (12%), Garst 645 (10%),
Aggressor (8%), Stine 9227 (8%), Cutter, Genesis and Nordic (5% each),
and Armor, Thunder, Arrow, Apollo, Clipper, Profit, Surpass, Apollo Supreme
and Dart (2% each). Approximate germplasm source contributions are: M.
falcata (8%), Ladak (8%), M. varia (20%), Turkistan (17%), Flemish
(32%), Chilean (8%), Peruvian (5%) and 2% unknown.
2. Quantum appears to be adapted to and is intended for use in the North Central U.S. It has been tested in Wisconsin, Iowa and Indiana.
3. Fall dormancy of Quantum is similar to Vernal. Flower color of Syn 2 generation is approximately 68% purple and 32% variegated, with a trace of cream, white and yellow.
4. Quantum has high resistance to anthracnose (race 1), bacterial wilt, Fusarium wilt, Verticillium wilt, Phytophthora root rot and pea aphid, and resistance to Aphanomyces (race 1). Reaction to stem nematode, spotted alfalfa aphid, blue alfalfa aphid and root knot nematode has not been determined.
5. Seed increase is limited to
one generation each of breeder (Syn 1), foundation (Syn 2) and certified
(Syn 3) seed classes. 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 1990. ABI will maintain sufficient seed
stocks for the projected life of the variety.
6. Certified seed will be available in 1993.
7. Plant Variety Protection will not be applied for.
8. This information can be forwarded
to the PVP office.