VS-622
(Experimental Desig.)
1. VS-622 is a synthetic variety. Parent plants trace to two populations selected for multifoliolate expression and resistance to one or more of the following pests: bacterial wilt, Verticillium wilt, anthracnose, Phytophthora root rot, Leptosphaerulina leafspot, and spotted alfalfa aphid. Phenotypic recurrent selection was used. Seed of the two populations was blended in equal quantities and used to establish a breeder seed field isolation. Parentage of VS-622 traces predominately (in order of contribution) to VS-545, Arrow, Centurion, Crown, Sure, and M. falcata PI 258754. Approximate germplasm source contributions are: M. falcata - 8%, Ladak - 6%, M. varia - 29%, Turkistan - 3%, Flemish - 50%, and Chilean - 4%.
2. VS-622 is intended for use in the north central and northeastern U.S. for hay, haylage, greenchop or dehy production. It has been tested in Wisconsin and Pennsylvania.
3. VS-622 is a dormant variety. Fall dormancy is similar to Ranger. Flower color is 75% purple and 25% variegated, with a trace of white, yellow and cream. At first flower 45% to 63% of the plants show some multifoliolate expression, depending on environment.
4. VS-622 has high resistance to bacterial wilt, anthracnose, and Phytophthora root rot, with resistance to Fusarium wilt, Verticillium wilt, and pea aphid. It has moderate resistance to spotted alfalfa aphid. VS-622 has significant resistance to Leptosphaerulina leafspot but actual percentage resistant plants has not been determined. Reaction to stem nematode and blue alfalfa aphid has not been adequately tested.
5. Seed increase is on a limited generation basis with one generation each of breeder and certified seed classes, and two generations of foundation seed. 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 the consent of the breeder. Breeder seed was produced under cage isolation at Woodland, CA. Sufficient foundation seed for the projected life of the variety will be maintained by VISTA. Stands of foundation and certified seed fields are limited to 3 and 6 years, respectively.
6. Certified seed will be marketed in 1990.
7. No decision has been made concerning Plant Variety Protection.
8. This information can be forwarded to the PVP office.
Variety Description Amendments
Paragraph four (4), Fusarium wilt changed to having "high resistance" from having "resistance".
Name: Multiplier