1. Magnum IV is a twenty two clone synthetic variety. Parent plants were selected out of forage yield plots and/or disease nurseries. These parent plants were progeny tested for one or more of the following traits: Forage yield, stand persistence, forage quality, resistance to bacterial wilt, Fusarium wilt, Phytophthora root rot, anthracnose (Race 1), spotted alfalfa aphid and pea aphid. Parent plants trace back to MNP-D1, Answer, Apollo, MNP-B1 (Syn. 2), Thor, Tempo, Teweles Multistrain, and Dairyland Experimentals. Dairyland Experimentals trace back to Vernal, Ranger, Lahontan and Iroquois. The percent of germplasm sources are Ladak (5), Turkistan (35), Flemish (40), and Chilean (20).
2. Magnum IV is adapted to and intended for use in the Northern half of the United States. The states where it has been tested are: Wisconsin, Minnesota, Iowa, Nebraska, Kansas, Idaho, Michigan, Illinois, Pennsylvania and New York.
3. Magnum IV is a dormant cultivar similar to Saranac in fall dormancy. Flower color in the Syn. 2 generation is 92% purple, 8% variegated, with trace amounts of cream, white and yellow.
4. Magnum IV has high resistance to bacterial wilt, Fusarium wilt, Phytophthora root rot, resistance to anthracnose (Race 1), Verticillium wilt, stem nematode, and moderate resistance to Aphanomyces root rot (Race 1), spotted alfalfa aphid, blue alfalfa aphid and northern root-knot nematode (M. hapla). It has not been tested for its reaction to pea aphid.
5. Breeder seed was produced from cuttings of the parental plants in an isolation block as Syn. 1 in Sloughhouse, CA in 1989-91. Seed was bulked in equal proportions each year, and lots were kept separate. Foundation seed (Syn. 2) was produced from Breeder seed and Certified seed (Syn. 2 or 3) from either Breeder or Foundation seed. One generation each of Breeder and Foundation and two generations of Certified seed (Syn. 2 or 3) classes are recognized. A maximum of three years each is permitted on stands producing Breeder and Foundation seed with five years for Certified seed. Sufficient Breeder seed for the projected life of the variety will be maintained by Dairyland Research.
6. Certified seed will be available spring of 1994.
7. Application for the Plant Variety Protection is undecided.
8. As a means of additional varietal
protection, information included with this application may be provided
to the PVP office.
November 23, 1993