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1. AlfaStar II is a
synthetic variety with 220 parent plants that were selected sequentially
for multifoliolate leaf expression and for resistance to Phytophthora
root rot and Aphanomyces root rot (race 1). Parent plants were
selected from crosses between selections from three-year old Minnesota
and Wisconsin yield trials. Yield trial
source varieties 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 (race 1),
anthracnose (race 1), and Leptosphaerulina leafspot. Parentage of
AlfaStar II traces to the following germplasm sources: BigHorn, DK 142,
Gold Plus, Hunter, and miscellaneous Cal/West Seeds breeding
populations. Breeder seed was produced under cage isolation near
Woodland, California in 1997. Seed was bulk harvested from all parent
plants. Approximate germp1asm source contributions are as follows: M.
falcata (8%), Ladak (5%), M. varia (27%), Turkistan (4%), Flemish (48%),
and Chilean (8%).
2. AlfaStar II is
adapted to and intended for use in the North Central, East Central, and
Great Plains areas of the U.S. AlfaStar II has been tested in Wisconsin,
Iowa, Michigan, Pennsylvania, Kansas, and Nebraska.
3. AlfaStar II is a
moderately dominant variety with fall dormancy similar to FD class 4
check varieties. Flower color observed in the Syn.2 generation is
greater than 98% purple with 1% variegated, and a trace of white, cream,
and yellow.
4. AlfaStar II has
high resistance to
anthracnose (race 1), bacterial wilt,
Fusarium wilt,
Phytophthora root rot, and Aphanomyces root rot (race 1), with
resistance to Verticillium wilt, spotted alfalfa aphid, stem nematode,
and
northern
root knot nematode (Meloidogyne hapla)
and moderate resistance
to pea aphid and blue alfalfa aphid.
5. Seed increase of AlfaStar II is on
a limited generation basis with one generation of breeder and two
generations of the foundation and certified seed classes. Breeder (Syn.
l), 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 cage
isolation near Woodland, California in 1997. 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
AlfaStar II will be available in 2003.
7.
No decision bas been made regarding Plant Variety Protection.
8. This information can
be forwarded to the PVP office.
9. Variety Name: AlfaStar
II Date
submitted: November 30, 2003.
Experimental
Designation: CW
74013 |